How to fill a 3D array with values calculated in a loop?
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I want to fill a 3D array with values calculated in a loop. Each iteration of the loop generates a single new value which I want to put in an array, so that I end up with a 2D array of all the new values that correspond to their parent value in the old matrix.
D = rand(3,3,4);
d = rand(2,4);
for i=1:3;
for j=1:3;
E = [D(i,j,1);D(i,j,2);D(i,j,3);D(i,j,4)];
F = d*E;
end
end
How do I print each iteration of 'F' into a new array? F is a 2x1 matrix, so I'd like to have one 3x3 array with the F(1,1) values and a second 3x3 array with the F(2,1) values. I'd like to have the arrays separate, I know I can always concatenate them if I need all the data in one place.
I'm also open to suggestions if you think I've gone about this poorly. Thanks in advance.
采纳的回答
This would be one way to do it if you have MATLAB R2016b or newer:
A = sum( D .* permute( d(1,:), [1, 3, 2] ), 3 ) ; % First array.
B = sum( D .* permute( d(2,:), [1, 3, 2] ), 3 ) ; % Second array.
1 个评论
Cedric
2017-10-30
If this is working for you, please [Accept] the answer. If not, I am happy to discuss what is not working.
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