On 4/29/2008 1:21 PM, Beck, Kenneth (STP) wrote:
Why will this simple statement not work? I think I am following the
documentation for if(cond) statements, and I have tried wrapping the
cons.expr and alt.expr in {}, I get the same error. There is no example
in the help file, and this is not covered in the Introduction to R,
SimpleR or other tutorials I have looked into.
mxx=max(cpx_list$nMV);
mxy=max(trend_list$nMV);
if (mxx>mxy)
mxy=mxx
else
mxx=mxy
Error: unexpected 'else' in "else"
Why does this error message have the first 'else' in single quote and
second in double??
Did you see this part of the help page?
"Note that it is a common mistake to forget to put braces ({ .. })
around your statements, e.g., after if(..) or for(....). In particular,
you should not have a newline between } and else to avoid a syntax error
in entering a if ... else construct at the keyboard or via source. For
that reason, one (somewhat extreme) attitude of defensive programming is
to always use braces, e.g., for if clauses."
Try this:
if (mxx > mxy) mxy <- mxx else mxx <- mxy
Or this:
{if (mxx > mxy)
mxy <- mxx
else
mxx <- mxy}
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Chuck Cleland, Ph.D.
NDRI, Inc. (www.ndri.org)
71 West 23rd Street, 8th floor
New York, NY 10010
tel: (212) 845-4495 (Tu, Th)
tel: (732) 512-0171 (M, W, F)
fax: (917) 438-0894
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
