this is better and it's ok thanks. But suppoing I have 4 matrices; and
i need to pick 1/5 of each of them; and put the result into one matrix;
how can I do it with a loop; the name of matrix are: A0, A1, A2, A3. I
don't know if this name convenction can help
thank you
--- Mer 13/5/09, John W. Eaton <address@hidden> ha scritto:
Da: John W. Eaton <address@hidden>
Oggetto: Re: extracting rows in a matrix
A: "Carlo Rossi" <address@hidden>
Cc: "Ben Abbott" <address@hidden>, address@hidden
Data: Mercoledì 13 maggio 2009, 15:27
On 13-May-2009, Carlo Rossi wrote:
| this is very cool but actually I need to write something that is good
| for Matlab too; and I notice only now that it doens't work in Matlab
| B = A(randperm (size (A, 1)), :)(1:size (A, 1)/5, :);
Then write it like this:
tmp = A(randperm (size (A, 1)), :);
B = tmp(1:size (A, 1)/5, :);
jwe
|