how to count how many time rows of an matrix apear in other matrix

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评论： Agung Pratama Pujayasa 2022-6-21

so i have local matrix

local = [1 1 3;

1 2 7;

1 3 5];

and global matrix

global = [1 1 3;

2 1 4;

1 3 5;

2 4 5];

is there's way i can get the amount of times rows fom local matrix is used in global matrix?in said example it should be 2

KSSV 2022-6-20

编辑：KSSV 2022-6-20

Read about ismember

A = [1 1 3;
    1 2 7;
    1 3 5];
B = [1 1 3;
    2 1 4;
    1 3 5;
    2 4 5];
[c,ia] = ismember(A,B,'rows')
N = nnz(c)

thank you very much, ismember is realy fit what i look for

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