filter out possiblity

Author: jgaffuri

pygridmap/__version__.py

@@ -13,7 +13,7 @@
 # *since*:        June 2020
 
 
-VERSION = (0, 0, 4)
+VERSION = (0, 0, 5)
 """Current version.
 """
 

pygridmap/gridtiler.py

@@ -213,7 +213,12 @@ def grid_transformation(input_file, function, output_file, input_file_delimiter
             for c in csvreader:
 
                 #apply function
-                function(c)
+                out = function(c)
+
+                #filter out
+                if out == False: continue
+
+                #to save space, by removing the ".0"
                 round_floats_to_ints(c)
 
                 #create writer, if necessary, write file header