Change values in an array based on existing values?

I've been looking through previous questions and nothing I've found worked quite well. I thought of using uniquetol but that a) didn't 100% address this problem and b) was not available in 2013a.

I have an array (timestamp_comp) with 2 columns of data. I want to filter the rows in that array based on the value of a cell in another array. Starting out:

     %%Finds row in timestamp_comp that approximately matches values in timestamp_meta
    e= 1e-5;
    crtimestamp_comp=zeros(size(timestamp_comp));
    for compare= timestamp_comp(:,2)-timestamp_meta(:,2)
        if compare > e
            crtimestamp_comp(:,:)=0;
        else
            crtimestamp_comp(:,:)=timestamp_comp(:,:);
        end
    end

Here I'm trying to convert all the rows in timestamp_comp that differ more than 1e-5 in the second column from timestamp_meta to zero and then all of the ones that are similar enough are kept.

Answer 1

[Andrei Bobrov]

Maybe so

crtimestamp_comp = timestamp_comp;
t = abs(timestamp_comp(:,2)-timestamp_meta(:,2)) > 1e-5;
crtimestamp_comp(t,:) = 0;