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e7bf2d1b
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Benoit Parmentier
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################## MULTI SAMPLING GAM FUSION METHOD ASSESSMENT ####################################
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############################ Merging LST and station data ##########################################
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fb039a6b
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Benoit Parmentier
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#This script interpolates tmax values using MODIS LST and GHCND station data
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#interpolation area. It requires the text file of stations and a shape file of the study area.
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#Note that the projection for both GHCND and study area is lonlat WGS84.
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#Options to run this program are:
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#1) Multisampling: vary the porportions of hold out and use random samples for each run
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#2)Constant sampling: use the same sample over the runs
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#3)over dates: run over for example 365 dates without mulitsampling
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#4)use seed number: use seed if random samples must be repeatable
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#5)GAM fusion: possibilty of running GAM+FUSION or GAM separately
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#AUTHOR: Benoit Parmentier
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760957d7
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Benoit Parmentier
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#DATE: 02/08/2013
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fb039a6b
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Benoit Parmentier
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#PROJECT: NCEAS INPLANT: Environment and Organisms --TASK#363--
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e7bf2d1b
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Benoit Parmentier
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###################################################################################################
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###Loading R library and packages
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library(gtools) # loading some useful tools
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library(mgcv) # GAM package by Simon Wood
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library(sp) # Spatial pacakge with class definition by Bivand et al.
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library(spdep) # Spatial pacakge with methods and spatial stat. by Bivand et al.
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library(rgdal) # GDAL wrapper for R, spatial utilities
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library(gstat) # Kriging and co-kriging by Pebesma et al.
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0163d0e2
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Benoit Parmentier
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library(fields) # NCAR Spatial Interpolation methods such as kriging, splines
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e7bf2d1b
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Benoit Parmentier
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library(raster) # Hijmans et al. package for raster processing
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library(rasterVis)
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library(parallel) # Urbanek S. and Ripley B., package for multi cores & parralel processing
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fb039a6b
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Benoit Parmentier
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library(reshape)
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library(plotrix)
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e7bf2d1b
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Benoit Parmentier
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### Parameters and argument
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fb039a6b
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Benoit Parmentier
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infile2<-"list_365_dates_04212012.txt"
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760957d7
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Benoit Parmentier
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infile_monthly<-"monthly_covariates_ghcn_data_TMAXy2010_2010_VE_02082013.shp"
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infile_daily<-"daily_covariates_ghcn_data_TMAXy2010_2010_VE_02082013.shp"
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infile_locs<-"stations_venezuela_region_y2010_2010_VE_02082013.shp"
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96c5053f
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Benoit Parmentier
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infile3<-"covariates__venezuela_region__VE_01292013.tif" #this is an output from covariate script
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e7bf2d1b
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Benoit Parmentier
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96c5053f
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Benoit Parmentier
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in_path<-"/home/parmentier/Data/IPLANT_project/Venezuela_interpolation/Venezuela_01142013/input_data"
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out_path<-"/home/parmentier/Data/IPLANT_project/Venezuela_interpolation/Venezuela_01142013/output_data"
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760957d7
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Benoit Parmentier
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script_path<-"/home/parmentier/Data/IPLANT_project/Venezuela_interpolation/Venezuela_01142013/"
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96c5053f
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Benoit Parmentier
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setwd(in_path)
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e7bf2d1b
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Benoit Parmentier
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0766370d
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Benoit Parmentier
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nmodels<-9 #number of models running
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e7bf2d1b
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Benoit Parmentier
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y_var_name<-"dailyTmax"
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predval<-1
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fb039a6b
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Benoit Parmentier
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seed_number<- 100 #if seed zero then no seed? #Seed number for random sampling
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760957d7
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Benoit Parmentier
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out_prefix<-"_10d_GAM_fus5_all_lstd_02082013" #User defined output prefix
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e7bf2d1b
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Benoit Parmentier
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bias_val<-0 #if value 1 then training data is used in the bias surface rather than the all monthly stations
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fb039a6b
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Benoit Parmentier
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bias_prediction<-1 #if value 1 then use GAM for the BIAS prediction otherwise GAM direct repdiction for y_var (daily tmax)
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nb_sample<-1 #number of time random sampling must be repeated for every hold out proportion
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prop_min<-0.3 #if prop_min=prop_max and step=0 then predicitons are done for the number of dates...
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prop_max<-0.3
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step<-0
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0766370d
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Benoit Parmentier
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constant<-0 #if value 1 then use the same samples as date one for the all set of dates
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96c5053f
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Benoit Parmentier
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#projection used in the interpolation of the study area: should be read directly from the outline of the study area
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760957d7
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Benoit Parmentier
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#CRS_interp<-"+proj=lcc +lat_1=43 +lat_2=45.5 +lat_0=41.75 +lon_0=-120.5 +x_0=400000 +y_0=0 +ellps=GRS80 +units=m +no_defs";
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fb039a6b
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Benoit Parmentier
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CRS_locs_WGS84<-CRS("+proj=longlat +ellps=WGS84 +datum=WGS84 +towgs84=0,0,0") #Station coords WGS84
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760957d7
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Benoit Parmentier
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source(file.path(script_path,"GAM_fusion_function_multisampling_02082013.R"))
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fb039a6b
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Benoit Parmentier
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###################### START OF THE SCRIPT ########################
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e7bf2d1b
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Benoit Parmentier
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96c5053f
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Benoit Parmentier
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###Reading the daily station data and setting up for models' comparison
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ghcn<-readOGR(dsn=in_path,layer=sub(".shp","",infile_daily))
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CRS_interp<-proj4string(ghcn) #Storing projection information (ellipsoid, datum,etc.)
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e7bf2d1b
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Benoit Parmentier
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96c5053f
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Benoit Parmentier
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stat_loc<-readOGR(dsn=in_path,layer=sub(".shp","",infile_locs))
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e7bf2d1b
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Benoit Parmentier
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96c5053f
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Benoit Parmentier
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data3<-readOGR(dsn=in_path,layer=sub(".shp","",infile_monthly))
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e7bf2d1b
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Benoit Parmentier
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760957d7
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Benoit Parmentier
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#Remove NA for LC and CANHEIGHT: Need to check this part after
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e7bf2d1b
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Benoit Parmentier
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ghcn$LC1[is.na(ghcn$LC1)]<-0
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ghcn$LC3[is.na(ghcn$LC3)]<-0
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ghcn$CANHEIGHT[is.na(ghcn$CANHEIGHT)]<-0
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0766370d
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Benoit Parmentier
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ghcn$LC4[is.na(ghcn$LC4)]<-0
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ghcn$LC6[is.na(ghcn$LC6)]<-0
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e7bf2d1b
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Benoit Parmentier
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760957d7
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Benoit Parmentier
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dates <-readLines(file.path(in_path,infile2)) #dates to be predicted
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e7bf2d1b
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Benoit Parmentier
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##Extracting the variables values from the raster files
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96c5053f
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Benoit Parmentier
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#The names of covariates can be changed...
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760957d7
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Benoit Parmentier
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rnames <-c("x","y","lon","lat","N","E","N_w","E_w","elev","slope","aspect","CANHEIGHT","DISTOC")
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96c5053f
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Benoit Parmentier
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lc_names<-c("LC1","LC2","LC3","LC4","LC5","LC6","LC7","LC8","LC9","LC10","LC11","LC12")
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lst_names<-c("mm_01","mm_02","mm_03","mm_04","mm_05","mm_06","mm_07","mm_08","mm_09","mm_10","mm_11","mm_12",
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"nobs_01","nobs_02","nobs_03","nobs_04","nobs_05","nobs_06","nobs_07","nobs_08",
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"nobs_09","nobs_10","nobs_11","nobs_12")
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covar_names<-c(rnames,lc_names,lst_names)
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s_raster<-stack(infile3) #read in the data stack
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names(s_raster)<-covar_names #Assigning names to the raster layers: making sure it is included in the extraction
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#Deal with no data value and zero
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760957d7
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Benoit Parmentier
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#pos<-match("LC1",layerNames(s_raster)) #Find column with name "value"
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#LC1<-raster(s_raster,layer=pos) #Select layer from stack
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#s_raster<-dropLayer(s_raster,pos)
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#LC1[is.na(LC1)]<-0
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#pos<-match("LC3",layerNames(s_raster)) #Find column with name "value"
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#LC3<-raster(s_raster,layer=pos) #Select layer from stack
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#s_raster<-dropLayer(s_raster,pos)
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#LC3[is.na(LC3)]<-0
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#pos<-match("CANHEIGHT",layerNames(s_raster)) #Find column with name "value"
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#CANHEIGHT<-raster(s_raster,layer=pos) #Select layer from stack
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#s_raster<-dropLayer(s_raster,pos)
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#CANHEIGHT[is.na(CANHEIGHT)]<-0
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#pos<-match("ELEV_SRTM",layerNames(s_raster)) #Find column with name "ELEV_SRTM"
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#ELEV_SRTM<-raster(s_raster,layer=pos) #Select layer from stack on 10/30
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#s_raster<-dropLayer(s_raster,pos)
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#ELEV_SRTM[ELEV_SRTM <0]<-NA
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e7bf2d1b
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Benoit Parmentier
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#s_sgdf<-as(s_raster,"SpatialGridDataFrame") #Conversion to spatial grid data frame
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###### Preparing tables for model assessment: specific diagnostic/metrics
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#Model assessment: specific diagnostics/metrics
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results_AIC<- matrix(1,1,nmodels+3)
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results_GCV<- matrix(1,1,nmodels+3)
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results_DEV<- matrix(1,1,nmodels+3)
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#results_RMSE_f<- matrix(1,length(models)+3)
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#Model assessment: general diagnostic/metrics
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results_RMSE <- matrix(1,1,nmodels+4)
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results_MAE <- matrix(1,1,nmodels+4)
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results_ME <- matrix(1,1,nmodels+4) #There are 8+1 models
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results_R2 <- matrix(1,1,nmodels+4) #Coef. of determination for the validation dataset
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results_RMSE_f<- matrix(1,1,nmodels+4) #RMSE fit, RMSE for the training dataset
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results_MAE_f <- matrix(1,1,nmodels+4)
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760957d7
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Benoit Parmentier
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######### Preparing daily and monthly values for training and testing
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96c5053f
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Benoit Parmentier
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760957d7
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Benoit Parmentier
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#Screening for daily bad values: value is tmax in this case
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e7bf2d1b
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Benoit Parmentier
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#ghcn$value<-as.numeric(ghcn$value)
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96c5053f
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Benoit Parmentier
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#ghcn_all<-ghcn
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#ghcn_test<-subset(ghcn,ghcn$value>-150 & ghcn$value<400)
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#ghcn_test<-ghcn
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#ghcn_test2<-subset(ghcn_test,ghcn_test$elev_1>0)
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#ghcn<-ghcn_test2
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e7bf2d1b
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Benoit Parmentier
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#coords<- ghcn[,c('x_OR83M','y_OR83M')]
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760957d7
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Benoit Parmentier
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#Now clean and screen monthly values
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#dst_all<-dst
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dst_all<-data3
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dst<-data3
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#dst<-subset(dst,dst$TMax>-15 & dst$TMax<45) #may choose different threshold??
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#dst<-subset(dst,dst$ELEV_SRTM>0) #This will drop two stations...or 24 rows
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e7bf2d1b
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Benoit Parmentier
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##Sampling: training and testing sites.
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96c5053f
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Benoit Parmentier
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#Make this a a function
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fb039a6b
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Benoit Parmentier
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if (seed_number>0) {
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set.seed(seed_number) #Using a seed number allow results based on random number to be compared...
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}
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e7bf2d1b
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Benoit Parmentier
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nel<-length(dates)
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dates_list<-vector("list",nel) #list of one row data.frame
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fb039a6b
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Benoit Parmentier
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prop_range<-(seq(from=prop_min,to=prop_max,by=step))*100 #range of proportion to run
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sn<-length(dates)*nb_sample*length(prop_range) #Number of samples to run
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e7bf2d1b
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Benoit Parmentier
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for(i in 1:length(dates)){
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d_tmp<-rep(dates[i],nb_sample*length(prop_range)) #repeating same date
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s_nb<-rep(1:nb_sample,length(prop_range)) #number of random sample per proportion
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prop_tmp<-sort(rep(prop_range, nb_sample))
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tab_run_tmp<-cbind(d_tmp,s_nb,prop_tmp)
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dates_list[[i]]<-tab_run_tmp
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}
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sampling_dat<-as.data.frame(do.call(rbind,dates_list))
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names(sampling_dat)<-c("date","run_samp","prop")
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for(i in 2:3){ # start of the for loop #1
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sampling_dat[,i]<-as.numeric(as.character(sampling_dat[,i]))
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}
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sampling_dat$date<- as.character(sampling_dat[,1])
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#ghcn.subsets <-lapply(dates, function(d) subset(ghcn, date==d)) #this creates a list of 10 or 365 subsets dataset based on dates
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ghcn.subsets <-lapply(as.character(sampling_dat$date), function(d) subset(ghcn, date==d)) #this creates a list of 10 or 365 subsets dataset based on dates
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fb039a6b
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Benoit Parmentier
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## adding choice of constant sample
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if (seed_number>0) {
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set.seed(seed_number) #Using a seed number allow results based on random number to be compared...
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}
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sampling<-vector("list",length(ghcn.subsets))
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sampling_station_id<-vector("list",length(ghcn.subsets))
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e7bf2d1b
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Benoit Parmentier
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for(i in 1:length(ghcn.subsets)){
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n<-nrow(ghcn.subsets[[i]])
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prop<-(sampling_dat$prop[i])/100
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ns<-n-round(n*prop) #Create a sample from the data frame with 70% of the rows
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nv<-n-ns #create a sample for validation with prop of the rows
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ind.training <- sample(nrow(ghcn.subsets[[i]]), size=ns, replace=FALSE) #This selects the index position for 70% of the rows taken randomly
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ind.testing <- setdiff(1:nrow(ghcn.subsets[[i]]), ind.training)
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fb039a6b
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Benoit Parmentier
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#Find the corresponding
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data_sampled<-ghcn.subsets[[i]][ind.training,] #selected the randomly sampled stations
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station_id.training<-data_sampled$station #selected id for the randomly sampled stations (115)
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#Save the information
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e7bf2d1b
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Benoit Parmentier
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sampling[[i]]<-ind.training
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fb039a6b
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Benoit Parmentier
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sampling_station_id[[i]]<- station_id.training
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}
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## Use same samples across the year...
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if (constant==1){
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sampled<-sampling[[1]]
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data_sampled<-ghcn.subsets[[1]][sampled,] #selected the randomly sampled stations
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station_sampled<-data_sampled$station #selected id for the randomly sampled stations (115)
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list_const_sampling<-vector("list",sn)
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list_const_sampling_station_id<-vector("list",sn)
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for(i in 1:sn){
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station_id.training<-intersect(station_sampled,ghcn.subsets[[i]]$station)
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ind.training<-match(station_id.training,ghcn.subsets[[i]]$station)
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list_const_sampling[[i]]<-ind.training
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list_const_sampling_station_id[[i]]<-station_id.training
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}
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sampling<-list_const_sampling
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sampling_station_id<-list_const_sampling_station_id
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e7bf2d1b
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Benoit Parmentier
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}
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######## Prediction for the range of dates and sampling data
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#gam_fus_mod<-mclapply(1:length(dates), runGAMFusion,mc.preschedule=FALSE,mc.cores = 8) #This is the end bracket from mclapply(...) statement
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fb039a6b
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Benoit Parmentier
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#gam_fus_mod_s<-mclapply(1:1, runGAMFusion,mc.preschedule=FALSE,mc.cores = 1) #This is the end bracket from mclapply(...) statement
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0766370d
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Benoit Parmentier
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gam_fus_mod_s<-mclapply(1:length(ghcn.subsets), runGAMFusion,mc.preschedule=FALSE,mc.cores = 9) #This is the end bracket from mclapply(...) statement
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fb039a6b
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Benoit Parmentier
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#gam_fus_mod2<-mclapply(4:4, runGAMFusion,mc.preschedule=FALSE,mc.cores = 1) #This is the end bracket from mclapply(...) statement
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e7bf2d1b
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Benoit Parmentier
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fb039a6b
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Benoit Parmentier
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save(gam_fus_mod_s,file= paste(path,"/","results2_fusion_Assessment_measure_all",out_prefix,".RData",sep=""))
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e7bf2d1b
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Benoit Parmentier
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## Plotting and saving diagnostic measures
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tb<-gam_fus_mod_s[[1]][[3]][0,] #empty data frame with metric table structure that can be used in rbinding...
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tb_tmp<-gam_fus_mod_s #copy
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for (i in 1:length(tb_tmp)){
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tmp<-tb_tmp[[i]][[3]]
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tb<-rbind(tb,tmp)
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}
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rm(tb_tmp)
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for(i in 4:ncol(tb)){ # start of the for loop #1
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tb[,i]<-as.numeric(as.character(tb[,i]))
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}
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Benoit Parmentier
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metrics<-as.character(unique(tb$metric)) #Name of accuracy metrics (RMSE,MAE etc.)
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tb_metric_list<-vector("list",length(metrics))
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for(i in 1:length(metrics)){ # Reorganizing information in terms of metrics
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metric_name<-paste("tb_",metrics[i],sep="")
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tb_metric<-subset(tb, metric==metrics[i])
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tb_metric<-cbind(tb_metric,sampling_dat[,2:3])
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assign(metric_name,tb_metric)
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tb_metric_list[[i]]<-tb_metric
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}
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tb_diagnostic<-do.call(rbind,tb_metric_list)
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Benoit Parmentier
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tb_diagnostic[["prop"]]<-as.factor(tb_diagnostic[["prop"]])
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mod_pat<-glob2rx("mod*")
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mod_var<-grep(mod_pat,names(tb_diagnostic),value=TRUE) # using grep with "value" extracts the matching names
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t<-melt(tb_diagnostic,
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measure=mod_var,
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id=c("dates","metric","prop"),
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na.rm=F)
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avg_tb<-cast(t,metric+prop~variable,mean)
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median_tb<-cast(t,metric+prop~variable,median)
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avg_tb[["prop"]]<-as.numeric(as.character(avg_tb[["prop"]]))
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avg_RMSE<-subset(avg_tb,metric=="RMSE")
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sampling_obj<-list(sampling_dat=sampling_dat,training=sampling, training_id=sampling_station_id, tb=tb_diagnostic)
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write.table(avg_tb, file= paste(path,"/","results2_fusion_Assessment_measure_avg_",out_prefix,".txt",sep=""), sep=",")
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write.table(median_tb, file= paste(path,"/","results2_fusion_Assessment_measure_median_",out_prefix,".txt",sep=""), sep=",")
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write.table(tb_diagnostic, file= paste(path,"/","results2_fusion_Assessment_measure",out_prefix,".txt",sep=""), sep=",")
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write.table(tb, file= paste(path,"/","results2_fusion_Assessment_measure_all",out_prefix,".txt",sep=""), sep=",")
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save(sampling_obj, file= paste(path,"/","results2_fusion_sampling_obj",out_prefix,".RData",sep=""))
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#save(gam_fus_mod_s,file= paste(path,"/","results2_fusion_Assessment_measure_all",out_prefix,".RData",sep=""))
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gam_fus_mod_obj<-list(gam_fus_mod=gam_fus_mod_s,sampling_obj=sampling_obj)
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save(gam_fus_mod_obj,file= paste(path,"/","results_mod_obj_",out_prefix,".RData",sep=""))
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#### END OF SCRIPT
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