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?
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