| Hello dear all, I have monthly precipitation data. I have seven files from 1940-2010, each covering ten years. The total number of months is 7*120=840. But when I concatenate all the files, I get L= 846 instead of 840; also, I have observed that it repeats some months and gives a missing value to one of them as shown below. 16-DEC-2000 00 / 725: 68.5 31-DEC-2000 12 / 726: .... 16-JAN-2001 00 / 727: 72.1 Your help on how to solve this case is highly appreciated Thank you, Fisseha |