finding index of rows in matlab

Question

i have a matrix B of N*3 dim. I want to find the indices of B whose column 3 has value 1.

I used the command [~,id]=ismember(1,B(:,3)). id returns only value 1 even though there are many rows in the matrix which has the column 3 with value 1. Can any one point out what is wrong in the command?

Dan · Accepted Answer · 2014-01-03 11:57:55Z

3

Rather do:

id = find(B(:,3)==1)

but as an aside, to use ismember you should swap your input [~,id]=ismember(B(:,3),1).

edited Jan 3, 2014 at 11:57

answered Jan 3, 2014 at 10:44

Dan

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