simple if...else causes syntax error
roger bos wrote:
I am trying to do the simplest thing in the world. The following works:
aaa <- ifelse(aaa==5, 6, 7)
But if I want to change the if...else syntax instead, it gives errors
and assigns 7 to aaa. Here is the problem code:
aaa <- 5
if ( aaa==5 ) {
aaa <- 6
}
else {
aaa <- 7
}
Here is the output:
aaa <- 5
if ( aaa==5 ) {
+ aaa <- 6 + }
else {
Error: syntax error
aaa <- 7 }
Error: syntax error
Hope someone can solve this easy question for me. BTW, how come "?if" does not pull up the help file for the 'if' statement?
Parser, try ?"if"
And in ?"if" read the Details section, which tells you:
"[...] In particular, you should not have a newline between } and else
to avoid a syntax error [...]".
The point is that
if(A)
B
is already syntactically complete (else can be omitted), so what the
parser does not know what follows and has to evaluate ...
Uwe Ligges
Thanks, Roger
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