Date: Jan 1, 2014 4:50 AM
Author: Bruno Luong
Subject: Re: Extracting particular row of a matrix based on specific condition
dpb <none@non.net> wrote in message <l9ulhp$sf7$1@speranza.aioe.org>...

> On 12/31/2013 2:16 AM, Bruno Luong wrote:

> > B(ismember(A,B(:,1)),2:end)

>

> That returns the rows in B for which the indices are found in A, not B,

> unfortunately, Bruno. It does get the first one correct as they're both

> in position 2, but then it returns fourth row, not first where the last

> element of A is found in first column of B...

You are write, it learns me not to do things too fast.

>

> >> [~,lb]=ismember(A,B(:,1));

> >> B(lb(lb>0),2:end)

> ans =

> 0.1300 0.0010 0.8900

> 0.1200 0.0050 0.1000

> >>

>

Should use the first argument of ismember() rather than recomputing it. Also OP requires the original order, so sort() will fix the order:

[t, iB] = ismember(A,B(:,1));

B(sort(iB(i)),2:end)

% Bruno