How do I delete columns from a matrix based on an array

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ozan aksu
ozan aksu 2017-3-20
评论： kowshik Thopalli 2017-3-20
I have matrix of A=[4 3 5 6 7; 1 4 8 4 7] and B=[3 6 7] and i want do delete columns of A which's first row contain the values of B and have the answer; A= [4 5; 1 8]
thank you

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James Tursa
James Tursa 2017-3-20
A(:,ismember(A(1,:),B)) = [];

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kowshik Thopalli
kowshik Thopalli 2017-3-20
As you can imagine there is more than one way to do this. here is one method.Not elegant but works
A=[4 3 5 6 7; 1 4 8 4 7];B=[3 6 7];
[ismem index] = ismember(A(1,:),B)
i=repmat(index,[2,1]
A(i~=0)=[]
reshape(A,2,2)

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