How to make three dimension matrix indexed sum return summation across the third dimension
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I want to get a 2d matrix after summing 3d matrix based on an index. Or how can I project the indexed sum to a 2d matrix? The example below gives only the sum for the indexes.
datax = rand(3,3,5);
cr1 = int32(randi([0, 1], [1, 45]));
cr1 = reshape(cr1,3,3,5);
cr2 = int32(randi([0, 1], [1, 45]));
cr2 = reshape(cr2,3,3,5);
inddata = find(cr1==1 & cr2==0);
sum(datax(inddata),2)
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采纳的回答
Jan
2021-5-14
datax = rand(3,3,5);
cr1 = rand(3,3,5) > 0.5;
cr2 = rand(3,3,5) > 0.5;
ignore = (~cr1 | cr2);
result = sum(datax .* ignore, 3)
If you really need int32 data:
cr1 = randi([0, 1], size(datax), 'int32');
cr2 = randi([0, 1], size(datax), 'int32');
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