Difference of elements of vector and matrix

Hello,

My input is A = [1, 2, 3, 4 ; 5, 6, 7, 8], B = [1, 3], my desired output is C = [1, 3 ; 5, 7].

Is it possible to use setdiff function here? I would rather not to use loop here because of the size of the data.

Answer 1

[Stephen23]

A = [1,2,3,4;5,6,7,8]

A = 2×4

1 2 3 4 5 6 7 8

B = [1,3]

B = 1×2

1 3

[X,Y] = ismember(B(1,:),A(1,:));
C = A(:,Y(X))

C = 2×2

1 3 5 7

[Rafal Jaremski]

Thank You, this answer suits to my problem best!

Answer 2

[Davide Masiello]

If the values of B are to be found strictly in the first row of A, then use this

clear,clc

A = [1, 2, 3, 4 ; 5, 6, 7, 8];
B = [1, 3];

C = A(:,any(A(1,:) == B',1))

C = 2×2

1 3 5 7

[Rafal Jaremski]

Thank You!