After hours of trying around, I gave up:
I have a 2-dimensional array, and I know how to split it into its rows and how to get the mean for every row using 'sapply'.
But what I want is to calculate the mean over the first n rows, and then the second n rows, etc., so that I get a vector like:
v == mean1(row 1:5), mean2(row6:10),...
(trivial, you might say. I find it rather mind-boggling, though: I tried to get the mean from the array before splitting it, after splitting it, looping through it with for-loops...I feel like an idiot by now; looks like I missed a crucial point of how 'R' works.)
Thanks a lot in advance! --
______________________________________________________
Jan Wantia Dept. of Information Technology, University of Zürich Andreasstr. 15 CH 8050 Zürich Switzerland
Tel.: +41 (0) 1 635 4315 Fax: +41 (0) 1 635 45 07 email: [EMAIL PROTECTED]
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