Here is another possibility:
> xxx
[1] "pi/2" "1/2"
> sapply(strsplit(xxx,split="/"),
+ function(x) {
+ x <- ifelse(x=="pi",pi,x)
+ as.numeric(x[1])/as.numeric(x[2])
+ }
+ )
[1] 1.570796 0.50
>
Thanks for everyone's help!
Sincerely,
Erin
On Wed, Oct 19, 2011 at 2:06 AM, Rolf Turner wrote:
On 19/10/11 19:30, Erin Hodgess wrote:
Dear R People:
Suppose I have the following:
"pi/2"
and I would like it to be 1.57.
Using as.numeric, here is my result:
as.numeric("pi/2")
[1] NA
Warning message:
NAs introduced by coercion
Is there a way to produce the numeric result, please
Hi,
I believe you want
eval(parse(text="pi/2"))
a word of warning exemplified in
eval(parse(text="library(fortunes) ; fortune(106)"))
HTH,
baptiste
On 19 October 2011 19:30, Erin Hodgess wrote:
> Dear R People:
>
> Suppose I have the following:
>
> "pi/2"
>
> and I would like it to be 1.5
I would imagine that you could parse+evaluate it like you asked about on
another thread; this isn't tested though. Does that work in your context?
Michael Weylandt
On Oct 19, 2011, at 2:30 AM, Erin Hodgess wrote:
> Dear R People:
>
> Suppose I have the following:
>
> "pi/2"
>
> and I would
Dear R People:
Suppose I have the following:
"pi/2"
and I would like it to be 1.57.
Using as.numeric, here is my result:
> as.numeric("pi/2")
[1] NA
Warning message:
NAs introduced by coercion
>
Is there a way to produce the numeric result, please?
Thanks,
Erin
--
Erin Hodgess
Associa
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