[R] unexpected subset select results?

[Erik Iverson]

ivo welch wrote:
> quizz---what does this produce?
> 
>    d=data.frame( a=1:1000, b=2001:3000, z= 5001:6000 )
>    attach(d); c <- (a+b)>25; detach(d)
>    d= subset(d, TRUE, select=c( a, b, c ))
> 
> yes, I know I have made a mistake, in that the code does not do what I
> presumably would have wanted.  

What exactly did you want?