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Hi all
i have
w1 =
1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
1.0000 1.0002 1.0000 1.0001 1.0000 1.0001
I want a new matrix with product of all terms in each 2x2 matrix in w1
Eventually, I need a 1x3 matrix.
If I use prod(w1), only the columns get multiplied.
Can anyone help please
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Walter Roberson
le 14 Oct 2011
blkproc(w1,[2 2],@prod)
4 commentaires
Walter Roberson
le 14 Oct 2011
x is the "formal argument" for the anonymous function. It is nearly exactly like the x in
proc result = multiplyblock(x)
result = prod(x(:));
end
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Image Analyst
le 14 Oct 2011
Looks like a job for blockproc().
% Generate sample data.
w1 =[...
1.0000 4.0000 1.0000 2.0000 1.0000 6.0000;
1.0000 1.0002 1.0000 1.0001 1.0000 1.0001]
% Declare a function
fun = @(block_struct) prod(block_struct.data(:))
% Do the job:
result = blockproc(w1,[2 2], fun)
Note I changed w1 to make it easier to see that it actually did the job.
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