Re: [R] creating a subset of a dataset using ifelse statement?

From: Ferdinand Alimadhi <falimadhi_at_iq.harvard.edu>
Date: Wed 14 Dec 2005 - 06:23:21 EST

?ifelse ; it's clear that you can use it in your case. Where cluster_q is comming from ( I suppose is the column name you want to filter by!)?
What if you use the simpler syntax :
if(h<1)
mp2<-mp1
else
mp2<-subset(mp1b,cluster_q==h)

?

THT t c wrote:

>I am using R in a Microsoft Windows environment.
>
> I have a dataset called "mp1b". I have a variable called h.
>
> h can take a value from -1 to 5.
>
> If h <1, I want to create a new dataset called mp2 that is the same as mp1b:
>
> "mp2<-mp1b"
>
> If h > 0, I want to set create a dataset mp2, where I limit the original dataset to those where mp1b$group = =h. similar to:
>
> "mp2<-subset (mp1b, group= = h)"
>
> I have tried this ifelse statement, but it does not seem to work as expected.
>
> "mp2<-ifelse(h<1,mp1b,subset(mp1b,cluster_q==h))"
>
> Assistance is appreciated.
>
>
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-- 
Ferdinand Alimadhi
Programmer / Analyst
Harvard University
The Institute for Quantitative Social Science
(617) 496-0187
falimadhi@latte.harvard.edu
www.iq.harvard.edu


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Received on Wed Dec 14 08:19:30 2005

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