On 2010-12-19 03:50, Luca Meyer wrote:
I am just wondering why what I am showing below might occur.
First I have an x data.frame:
str(x)
'data.frame': 281 obs. of 2 variables:
$ x1 : Factor w/ 5 levels "A (50-67%)","B (10-20%)",..: 1 2 5 1 2 5 1 2 5 1
...
$ x2 : num 33.8 60.2 6 76.8 13.8 9.4 76.9 8 15.1 78.1 ...
I need to check that for each level of factor x1 the values of x2 are (approximately) contained
within a given range. In such a case I will print "ok" a third variable, otherwise I will
write "err"
ifelse (x$x1 == "A (50-67%)",
x$check<-ifelse(x$x2<68&x$x2>49,"ok","xxxx"),
x$check<-x$check
)
[...snip...]
Can anyone explain why this might occur?
You have a bit of a logic problem in your ifelse;
(look at your x$check after each of your ifelse()s);
try it this way:
x$check <- NA
x$check <- ifelse (x$x1 == "A (50-67%)",
ifelse(x$x2<68&x$x2>49,"ok","xxxx"),
x$check
)
etc.
Peter Ehlers
Thanks,
Luca
Luca Meyer
www.lucameyer.com
IBM SPSS Statistics release 19.0.0
R version 2.12.1 (2010-12-16)
Mac OS X 10.6.5 (10H574) - kernel Darwin 10.5.0
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