diff --git a/R/ALS_data_preprocessing.Rmd b/R/ALS_data_preprocessing.Rmd
index a33fa81b65343dce7fb23f414b9887cb3d0b1fd1..1d1311ebe50ad3abca7c7c4ba40250a8e4b4be49 100644
--- a/R/ALS_data_preprocessing.Rmd
+++ b/R/ALS_data_preprocessing.Rmd
@@ -260,9 +260,9 @@ f <-
       # number of points
       npoints = length(rn),
       # number of first points (proxy for pulse number)
-      npulses = sum(rn == 1), 
+      npulses = sum(rn == 1),
       # number of points of class ground
-      nground = sum(c == 2), 
+      nground = sum(c == 2),
       # number of unique values of strips
       nstrip = length(unique(pid)) 
     )