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Difference between columns, fixed the first column, in a matrix

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Montserrat Vallcorba Martí
评论： Montserrat Vallcorba Martí 2017-11-3
Hi, I have a 3D-matrix and I want to calculate differences between columns, fixed the first column, and the value be positive or zero, i.e., for each 3D dimension calculate: max ( column(i)-column(1), 0 ). For example:
Thank you in advance!

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Adam
Adam 2017-11-3
编辑：Adam 2017-11-3
res = max( 0, A(:,2:end,:) - A(:,1,:) );
Note: This syntax only works from R2016b. For older syntax see Andrei Bobrov's answer

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Andrei Bobrov
Andrei Bobrov 2017-11-3
编辑：Andrei Bobrov 2017-11-3
B = bsxfun(@minus,A(:,2:end,:),A(:,1,:));
B(B<0) = 0;

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