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Task/CSV-data-manipulation/REXX/csv-data-manipulation.rexx

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+/* REXX ***************************************************************
+* extend in.csv to add a column containing the sum of the lines' elems
+* 21.06.2013 Walter Pachl
+**********************************************************************/
+csv='in.csv'
+Do i=1 By 1 While lines(csv)>0
+  l=linein(csv)
+  If i=1 Then
+    l.i=l',SUM'
+  Else Do
+    ol=l
+    sum=0
+    Do While l<>''
+      Parse Var l e ',' l
+      sum=sum+e
+      End
+    l.i=ol','sum
+    End
+  End
+Call lineout csv
+'erase' csv
+Do i=1 To i-1
+  Call lineout csv,l.i
+  End