selecting rows from column vectors

Hi all, I have 10 column vectors with 52,520 observations. I want to extract expecfic observation rows per column vectors, I am trying to use the following code without any luck ( getting a 0*10 table). Is there any reference or other way to do this I can look to?

Thanks in advance

load mpw %dataset
h103 = mpw(mpw.hid=='103',:); %103 is the sample ID across 512 rows * 10 columns ( on this step I am getting a 0*10  table
h103(1:512,{'v1','v2','temp1','temp2','rh1','rh2'});

Answer 1

[madhan ravi]

 mpw.hid=='103'

With

 strcmp(mpw.hid,'103')

[madhan ravi]

Or use ismember() if you’re using an older version.

[desert_scientist90]

Thanks,this is a life saver!