[R] Plotting a simple subset

[Peter Wolf]

Michael Hopkins wrote:

>Hi all
>
>Just converting from Stata to R and struggling a little to come to terms
>with the new philosophy/command line.
>
>E.g. I want to plot x against y if x < 5
>
>In Stata: graph x y, if( x < 5 )
>
>How do I do this in R?  Have tried most of the obvious options without
>success.
>
>Can I have multiple subsets? I.e. In Stata: if( x < 5 && y > 3 )
>

Try:

x<-rnorm(20,0,5)
y<-2*x+rnorm(20)
# plot without condition
plot(x,y)
# some conditions on x and y
index<- x<5 & y>3
plot(x[index],y[index])

Peter Wolf

>
>TIA 
>
>Michael
>
>
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