diff --git a/plotting/layout.R b/plotting/layout.R
index 0f0271a3a8a98d1c6c52896c87b637742223f9e0..afb19ca3b3e442a51b6971665b23536730a7a216 100644
--- a/plotting/layout.R
+++ b/plotting/layout.R
@@ -164,7 +164,7 @@ datasheet_layout = function (df_data, df_meta, layout_matrix,
         dir.create(outdirTmp)
     }
 
-    # Number of variable studied
+    # Number of type/variable
     nbp = length(df_data)
 
     # Convert data tibble to list of tibble if it is not the case
diff --git a/plotting/map.R b/plotting/map.R
index 564635a55d3dbd67756bc7ed0a2934acf6fcec79..a7ccdbd36169662bf3e11c1814433c172d33ccd3 100644
--- a/plotting/map.R
+++ b/plotting/map.R
@@ -29,60 +29,72 @@
 ## 1. MAP PANEL
 map_panel = function (list_df2plot, df_meta, df_shapefile, idPer=1, outdirTmp='', codeLight=NULL, margin=NULL, showSea=TRUE, verbose=TRUE) {
 
-    
+    # Extract shapefiles
     df_france = df_shapefile$france
     df_bassin = df_shapefile$bassin
     df_river = df_shapefile$river
 
-    # Number of type/variable
+    # Number of variable/plot
     nbp = length(list_df2plot)
   
     # Get all different stations code
     Code = levels(factor(df_meta$code))
     nCode = length(Code)
-    
+
+    # Gets a trend example
     df_trend = list_df2plot[[1]]$trend
     
     nPeriod_max = 0
     for (code in Code) {
-        
+        # Extracts the trend corresponding to the code
         df_trend_code = df_trend[df_trend$code == code,]
         
+        # Extract start and end of trend periods
         Start = df_trend_code$period_start
-        UStart = levels(factor(Start))
-        
         End = df_trend_code$period_end
+        # Get the name of the different period
+        UStart = levels(factor(Start))        
         UEnd = levels(factor(End))
-        
+
+        # Compute the max of different start and end
+        # so the number of different period
         nPeriod = max(length(UStart), length(UEnd))
-        
+
+        # If the number of period for the trend is greater
+        # than the current max period, stocks it
         if (nPeriod > nPeriod_max) {
             nPeriod_max = nPeriod
         }
     }
-    
+
+    # Blank list to store time info by station code
     Start_code = vector(mode='list', length=nCode)
     End_code = vector(mode='list', length=nCode)
     Code_code = vector(mode='list', length=nCode)
     Periods_code = vector(mode='list', length=nCode)
-
+    # For all the code
     for (j in 1:nCode) {
-        
+        # Gets the code
         code = Code[j]
-
+        # Extracts the trend corresponding to the code
         df_trend_code = df_trend[df_trend$code == code,]
 
+        # Extract start and end of trend periods
         Start = df_trend_code$period_start
-        UStart = levels(factor(Start))
-        
         End = df_trend_code$period_end
+        # Get the name of the different period
+        UStart = levels(factor(Start))        
         UEnd = levels(factor(End))
-        
-        nPeriod = max(length(UStart), length(UEnd))
 
+        # Compute the max of different start and end
+        # so the number of different period
+        nPeriod = max(length(UStart), length(UEnd))
+        
+        # Vector to store trend period
         Periods = c()
-
+        # For all the period
         for (i in 1:nPeriod_max) {
+            # Stocks period
             Periods = append(Periods, 
                              paste(substr(Start[i], 1, 4),
                                    substr(End[i], 1, 4),
@@ -98,20 +110,24 @@ map_panel = function (list_df2plot, df_meta, df_shapefile, idPer=1, outdirTmp=''
 
     TrendMean_code = array(rep(1, nPeriod_max*nbp*nCode),
                            dim=c(nPeriod_max, nbp, nCode))
-
+    # For all the period
     for (j in 1:nPeriod_max) {
-
+        # For all the code
         for (k in 1:nCode) {
-            
+            # Gets the code
             code = Code[k]
-            
+            # For all variable
             for (i in 1:nbp) {
-                
+                # Extracts the data corresponding to the
+                # current variable
                 df_data = list_df2plot[[i]]$data
+                # Extracts the trend corresponding to the
+                # current variable
                 df_trend = list_df2plot[[i]]$trend
                 p_threshold = list_df2plot[[i]]$p_threshold
-
-                df_data_code = df_data[df_data$code == code,] 
+                # Extracts the data corresponding to the code
+                df_data_code = df_data[df_data$code == code,]
+                # Extracts the trend corresponding to the code
                 df_trend_code = df_trend[df_trend$code == code,]
 
                 Start = Start_code[Code_code == code][[1]][j]
@@ -148,13 +164,13 @@ map_panel = function (list_df2plot, df_meta, df_shapefile, idPer=1, outdirTmp=''
 
     ncolor = 256
     nbTick = 10
-    
+    # For all variable
     for (i in 1:nbp) {
         
         if (i > 1 & !is.null(codeLight)) {
             break
         }
-
+        # Extract the variable of the plot
         type = list_df2plot[[i]]$type
         outname = paste('map_', type, sep='')
         if (verbose) {
@@ -175,7 +191,7 @@ map_panel = function (list_df2plot, df_meta, df_shapefile, idPer=1, outdirTmp=''
             
             # theme(plot.background=element_rect(fill=NA,
                                                # color="#EC4899")) +
-            
+            # Fixed coordinate system
             coord_fixed() +
             
             geom_polygon(data=df_france,
@@ -261,14 +277,17 @@ map_panel = function (list_df2plot, df_meta, df_shapefile, idPer=1, outdirTmp=''
         shape = c()
         trend = c()
         p_threshold_Ok = c()
-        
+        # For all code
         for (code in Code) {
-            
+            # Extracts the data corresponding to the current variable
             df_data = list_df2plot[[i]]$data
+            # Extracts the trend corresponding to the
+            # current variable
             df_trend = list_df2plot[[i]]$trend
             p_threshold = list_df2plot[[i]]$p_threshold
-            
-            df_data_code = df_data[df_data$code == code,] 
+            # Extracts the data corresponding to the code
+            df_data_code = df_data[df_data$code == code,]
+            # Extracts the trend corresponding to the code
             df_trend_code = df_trend[df_trend$code == code,]
             
             Start = Start_code[Code_code == code][[1]][idPer]
diff --git a/plotting/matrix.R b/plotting/matrix.R
index 69468df452de9c05985fb091e6f8fcf9ce349b02..8479beb06ccc1af9273c86f6b09521a1f93ed25c 100644
--- a/plotting/matrix.R
+++ b/plotting/matrix.R
@@ -29,60 +29,73 @@
 ## 1. MATRIX PANEL
 matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice=NULL, outdirTmp='', outnameTmp='matrix', title=NULL, A3=FALSE) {
 
+    # Number of variable/plot
     nbp = length(list_df2plot)
     
     # Get all different stations code
     Code = levels(factor(df_meta$code))
     nCode = length(Code)
 
+    # Gets a trend example
     df_trend = list_df2plot[[1]]$trend
 
     # Convert 'trend_period' to list
     trend_period = as.list(trend_period)
     # Number of trend period
     nPeriod_trend = length(trend_period)
-    
+
+    # Fix the maximal number of period to the minimal possible
     nPeriod_max = 0
+    # For all code 
     for (code in Code) {
-        
+        # Extracts the trend corresponding to the code
         df_trend_code = df_trend[df_trend$code == code,]
-
-        Start = df_trend_code$period_start
-        UStart = levels(factor(Start))
         
+        # Extract start and end of trend periods
+        Start = df_trend_code$period_start
         End = df_trend_code$period_end
+        # Get the name of the different period
+        UStart = levels(factor(Start))        
         UEnd = levels(factor(End))
-        
+
+        # Compute the max of different start and end
+        # so the number of different period
         nPeriod = max(length(UStart), length(UEnd))
 
+        # If the number of period for the trend is greater
+        # than the current max period, stocks it
         if (nPeriod > nPeriod_max) {
             nPeriod_max = nPeriod
         }
     }
 
-    
+    # Blank list to store time info by station code
     Start_code = vector(mode='list', length=nCode)
     End_code = vector(mode='list', length=nCode)
     Code_code = vector(mode='list', length=nCode)
     Periods_code = vector(mode='list', length=nCode)
-
+    # For all the code
     for (j in 1:nCode) {
-        
+        # Gets the code
         code = Code[j]
-
+        # Extracts the trend corresponding to the code
         df_trend_code = df_trend[df_trend$code == code,]
 
+        # Extract start and end of trend periods
         Start = df_trend_code$period_start
-        UStart = levels(factor(Start))
-        
         End = df_trend_code$period_end
+        # Get the name of the different period
+        UStart = levels(factor(Start))        
         UEnd = levels(factor(End))
-        
-        nPeriod = max(length(UStart), length(UEnd))
 
+        # Compute the max of different start and end
+        # so the number of different period
+        nPeriod = max(length(UStart), length(UEnd))
+        # Vector to store trend period
         Periods = c()
-
+        # For all the trend period
         for (i in 1:nPeriod_trend) {
+            # Stocks period
             Periods = append(Periods, 
                              paste(Start[i],
                                    End[i],
@@ -98,20 +111,24 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
 
     TrendMean_code = array(rep(1, nPeriod_trend*nbp*nCode),
                            dim=c(nPeriod_trend, nbp, nCode))
-
+    # For all the trend period
     for (j in 1:nPeriod_trend) {
-
+        # For all the code
         for (k in 1:nCode) {
-            
+            # Gets the code
             code = Code[k]
-            
+            # For all variable
             for (i in 1:nbp) {
-                
+                # Extracts the data corresponding to the
+                # current variable
                 df_data = list_df2plot[[i]]$data
+                # Extracts the trend corresponding to the
+                # current variable
                 df_trend = list_df2plot[[i]]$trend
                 p_threshold = list_df2plot[[i]]$p_threshold
-
-                df_data_code = df_data[df_data$code == code,] 
+                # Extracts the data corresponding to the code
+                df_data_code = df_data[df_data$code == code,]
+                # Extracts the trend corresponding to the code
                 df_trend_code = df_trend[df_trend$code == code,]
 
                 Start = Start_code[Code_code == code][[1]][j]
@@ -156,18 +173,23 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
     DataMean_trend = c()
     Fill_trend = c()
     Color_trend = c()
-
+    # For all the trend period
     for (j in 1:nPeriod_trend) {
-
+        # For all code
         for (code in Code) {
-            
+            # For all variable
             for (i in 1:nbp) {
+                # Extracts the data corresponding to the current variable
                 df_data = list_df2plot[[i]]$data
+                # Extracts the trend corresponding to the
+                # current variable
                 df_trend = list_df2plot[[i]]$trend
                 p_threshold = list_df2plot[[i]]$p_threshold
+                # Extract the variable of the plot
                 type = list_df2plot[[i]]$type
-                
-                df_data_code = df_data[df_data$code == code,] 
+                # Extracts the data corresponding to the code
+                df_data_code = df_data[df_data$code == code,]
+                # Extracts the trend corresponding to the code
                 df_trend_code = df_trend[df_trend$code == code,]
 
                 Start = Start_code[Code_code == code][[1]][j]
@@ -243,16 +265,18 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
         
         # For all mean period
         for (j in 1:nPeriod_mean) {
-
+            # For all the code
             for (k in 1:nCode) {
-                
+                # Gets the code
                 code = Code[k]
-                
+                # For all variable
                 for (i in 1:nbp) {
-                    
+                    # Extracts the data corresponding to
+                    # the current variable
                     df_data = list_df2plot[[i]]$data
+                    # Extract the variable of the plot
                     type = list_df2plot[[i]]$type
-                    
+                    # Extracts the data corresponding to the code
                     df_data_code = df_data[df_data$code == code,] 
                     
                     # Get the current start and end of the sub period
@@ -310,11 +334,11 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
 
         ii = 1
         for (j in 1:nPeriod_mean) {
-            
+            # For all the code
             for (k in 1:nCode) {
-                
+                # Gets the code
                 code = Code[k]
-                
+                # For all variable
                 for (i in 1:nbp) {
                     
                     BreakMean = BreakMean_mean[ii]
@@ -353,9 +377,6 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
         nsubCodefL = length(subCodefL)
         
         nMat = as.integer(nsubCodefL/slice) + 1
-
-        # print(nsubCodefL)
-        # print(nMat)
         
         for (imat in 1:nMat) {
             subCode = subCodefL[(slice*(imat-1)+1):(slice*imat)]
@@ -420,6 +441,7 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
 
             
             ### Trend ###
+            # For all the trend period
             for (j in 1:nPeriod_trend) {
 
                 Type_trend_per =
@@ -515,8 +537,9 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
                              label=bquote(bold('Fin')),
                              hjust=0.5, vjust=0.5, 
                              size=3, color='grey20')
-                
+                # For all variable
                 for (i in 1:nbp) {
+                    # Extract the variable of the plot
                     type = list_df2plot[[i]]$type
                     mat = mat +
                         annotate('text', x=X[i], y=max(Y) + 0.82,
@@ -541,6 +564,7 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
                 }
 
                 for (k in 1:nsubCode) {
+                    # Gets the code
                     code = subCode[k]
 
                     label = Periods_trend[subNPeriod_trend == j
@@ -675,8 +699,9 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
                              label=bquote(bold('Fin')),
                              hjust=0.5, vjust=0.5, 
                              size=3, color='grey20')
-                
+                # For all variable
                 for (i in 1:nbp) {
+                    # Extract the variable of the plot
                     type = list_df2plot[[i]]$type
                     mat = mat +
                         annotate('text', x=Xm_mean[i], y=max(Y) + 0.82,
@@ -726,7 +751,7 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
             
             ### Code ###
             for (k in 1:nsubCode) {
-
+                # Gets the code
                 code = subCode[k]
                 name = df_meta[df_meta$code == code,]$nom
                 ncharMax = 38
@@ -746,11 +771,9 @@ matrix_panel = function (list_df2plot, df_meta, trend_period, mean_period, slice
                              size=3.5, color="#00A3A8")
             }
 
-
             ### Environment ###
-
             mat = mat +
-                
+                # Fixed coordinate system
                 coord_fixed() +
                 
                 scale_x_continuous(limits=c(1 - rel(6),