
Dear All,
thank you very much for your help again. I tried now most of the 
different proposals for importing the ascii grids & calculating the 
temporal mean. All proposals are more elegant than my script, but 
unfortunately the "stacking" and "bricking" is much more time and 
computational demanding. I made some kind of benchmark testing. The 
result is, that my not so elegant script is doing the job within 1minute 
& 20 sec., while if I use stacking or bricking the best results are 
about 10-12 minutes (for 360 Ascii Grids; 12* 30 years). So, for now I 
will go on using my "old" script.

Best,
Swen


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