subtract different column by different number

Patrick

2014 10 1

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I have a 1000x3 matrix. I want to subtract different column from different number. For example, the first column elements will all be subtracted from 10, those in the second column will be subtracted from 2, the third column will be subtracted from 3.

Any good ways to do this? Thanks a lot!

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Mischa Kim 2014-10-1

在 MATLAB Online 中打开

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Patrick, use bsxfun:

 A = [1 2 10; 1 4 20; 1 6 15];
 A
 A =
     1     2    10
     1     4    20
     1     6    15
 B = bsxfun(@minus, [1 2 3], A)
 B =
     0     0    -7
     0    -2   -17
     0    -4   -12