I have a function like this:
changedir <- function(dataframe) {
dir <- dataframe$dir
gc_content <- dataframe$gc_content
d <- ifelse(dir == "-",
gc_content <- -gc_content,gc_content <- gc_content)
return(d)
}
The goal of this function is to be able to input a data frame like this:
> lala
dir gc_content
1 + 0.5
2 - 0.5
3 + 0.5
4 - 0.5
5 + 0.5
6 - 0.5
7 + 0.5
8 - 0.5
9 + 0.5
10 - 0.5
11 + 0.5
12 - 0.5
13 + 0.5
14 - 0.5
15 + 0.5
16 - 0.5
17 + 0.5
18 - 0.5
19 + 0.5
20 - 0.5
>
And change the sign of the value of the gc_content field if the
corresponding dir field is negative.
Howver, when I run this through the changedir function, all of the
gc_contents become negative.
An I misunderstanding how to use the ifelse construct? And in that
case, how should I go about doing this in a different way?
Thankyou very much in advance for your help, and I hope that my
question is not too banal!
Karin
--
Karin Lagesen, PhD student
[EMAIL PROTECTED]
http://folk.uio.no/karinlag
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