Hi Brian,

It's almost the same. Try this:

yourdata=cbind(Age,Sex,Ill)  # Age, Sex and Ill are the variables in your
post :)
yourdata[yourdata[,3]=='Yes',]

#or

yourdata[yourdata[,3]!='Yes',]


HTH,

Jorge








On Wed, Aug 20, 2008 at 2:24 PM, <bad2101@columbia.edu> wrote:

> I think I should be clearer.  Given the matrix of column vectors Age, Sex,
> and Ill
>
>
> Age=c(11,52,65,59,13,63,70,40,15,33,65,38,62,10,25,32,62,36,11,33,13,7,64,3,65,59,15,62,37,17,35,15,50,40,35,35,36,57,16,68,54,77,72,58,20,17,62,20,52,9,50,8,35,48,25,11,74,12,44,53,37,24,69,7,17,8,11,17,36,21,60,18,14,52,45)
>
> Sex=c("Male","Female","Male","Female","Female","Female","Male","Female","Female","Female","Male","Female","Female","Male","Male","Female","Female","Male","Male","Female","Female","Male","Male","Male","Female","Female","Female","Male","Female","Male","Male","Male","Female","Male","Female","Female","Male","Female","Female","Male","Female","Male","Female","Male","Male","Male","Female","Female","Female","Female","Male","Male","Female","Female","Male","Female","Male","Female","Female","Female","Male","Female","Female","Male","Female","Female","Female","Male","Female","Female","Male","Female","Female","Male","Female")
>
> Ill=c("No","Yes","Yes","Yes","No","Yes","Yes","Yes","Yes","Yes","No","No","No","Yes","No","Yes","Yes","Yes","No","Yes","Yes","Yes","No","Yes","No","Yes","Yes","No","Yes","No","Yes","Yes","Yes","No","No","Yes","No","Yes","Yes","Yes","No","Yes","Yes","Yes","No","No","Yes","Yes","Yes","No","No","Yes","No","Yes","Yes","No","Yes","Yes","Yes","Yes","No","No","No","No","Yes","Yes","No","No","No","Yes","Yes","Yes","No","Yes","Yes")
> o=order(Ill)
> cbind(Age[o],Sex[o],Ill[o])
>
> I am trying to remove all rows of the matrix in which the element in the
> Ill column vector is "No".  I appreciate any help you have to offer.
>
> Brian
>
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