diff --git a/Header_TT.R b/Header_TT.R
index 379a250..de1403b 100755
--- a/Header_TT.R
+++ b/Header_TT.R
@@ -1,3 +1,4 @@
+#!/usr/bin/Rscript  
 #if (!require(tidyverse)){
 #install.packages("tidyverse")
 #}
@@ -84,6 +85,9 @@ library(qwraps2)
 
 #library(ComplexHeatmap)
 
+########################################################################
+# My functions
+########################################################################
 
 my_kurtosis <- function(x) {  
   m4 <- mean((x - mean(x))^4) 
diff --git a/read_data.R b/read_data.R
old mode 100644
new mode 100755
diff --git a/stats_paired.R b/stats_paired.R
old mode 100644
new mode 100755
diff --git a/stats_unpaired.R b/stats_unpaired.R
old mode 100644
new mode 100755
diff --git a/summary_stats_by_time_outcome.R b/summary_stats_time_outcome.R
old mode 100644
new mode 100755
similarity index 100%
rename from summary_stats_by_time_outcome.R
rename to summary_stats_time_outcome.R