Thanks for the reply.

my file looks something like this

ncols 498
nrows 541
xllcorner 1394682.720294049475
yllcorner 1751328.700356452260
cellsize 2000.000000000000
NODATA_value -9999
-9999 -9999 -9999 -9999 -9999 -9999 0.09 -0.001

[download]

Though it is a lot bigger in terms of the number of rows and columns. So what i want to do is skip the first six lines and multiply the rest of the text excluding -9999 with a constant. Also all the small negative values should be converted to 0 or -9999. The resulting can be overwritten onto the same text file or onto a new file.

Thanks a lot for your help

In reply to Re^2: Multiply the numbers in a text file by zegoofer
in thread Multiply the numbers in a text file by zegoofer

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