assign values

Peter Dalgaard <p.dalgaard at biostat.ku.dk> wrote:
Robert writes:

Professor,
What does if ((x=2)) 2 mean?
Thanks,
Robert
it assigns 2 to x, then uses the result (i.e. whether it is non-zero)
as the condition for the if() construct. So in this case, the
condition is always TRUE and the result is always 2.

I see. 

if ((x=2)) 2
[1] 2
if ((x=0)) 2

Look at the text above "(i.e. whether it is non-zero)", and:

as.logical(seq(-2,2,1))

and then at your result - numeric x with value 0 is being cast to logical 
FALSE, so this is as described.

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Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
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assign values

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