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

[Uwe Ligges]

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))”

mp2 <- if(h<1) mp1b else subset(mp1b,cluster_q==h)

Uwe Ligges


>   Assistance is appreciated.
> 
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