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finding specific values' rows numbers in an array

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sermet
sermet 2015-6-29
编辑： Guillaume 2015-6-29
a=[11;4;3;99;5;6;7];
b=[4;7];
I need to find which rows in a matrix include 4,7. The answer must be 2th and 7th rows w.r.t. the solution.

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Guillaume
Guillaume 2015-6-29
编辑：Guillaume 2015-6-29
Use the second return value of ismember:
[~, row] = ismember(b, a)
row will be 0 if the value in b is not found in a.

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Thorsten
Thorsten 2015-6-29
编辑：Thorsten 2015-6-29
find(a==4)
find(a==7)
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sermet
sermet 2015-6-29
how can I adopt this solution as creating loop. Because arrays' rows are several hundreds.

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