Richard,
Thanks for your observation and tip.
My apologies that the 'expr' seemed undefined. That was intentional on my part
as I only wanted to show the form of the non-working code. Let me be clearer
by updating the code with what I actually type at the command line. The code
below does not work (error message included).
x <- c("Choice 1", "Choice 2", "Choice 3")
switch("Choice 2", x[1]="My first choice", x[2]="My 2nd choice", x[3]="My 3rd
choice")
Error: unexpected '=' in "switch("Choice 2", x[1]="
On an earlier reply, David Winsemius suggested using the 'match' function
instead. Perhaps that is the way to go, bypassing 'switch' altogether. But I
would like to know why the code above does not work.
Again, many thanks,
Mauricio
________________________________
From: Richard M. Heiberger <r...@temple.edu>
Cc: "r-help@r-project.org" <r-help@r-project.org>
Sent: Tuesday, August 16, 2011 6:59 PM
Subject: Re: [R] How to use 'switch' with strings containing spaces?
The problem is that your argument expr is undefined.
This works
> switch("Choice 2", "Choice 1"="My first choice", "Choice 2"="My 2nd choice",
> "Choice 3"="My 3rd choice")
[1] "My 2nd choice"
> x <- "Choice 2"
> switch(x, "Choice 1"="My first choice", "Choice 2"="My 2nd choice", "Choice
> 3"="My 3rd choice")
[1] "My 2nd choice"
>
On Tue, Aug 16, 2011 at 4:53 PM, Mauricio Cornejo <mauriciocorn...@yahoo.com>
wrote:
Hi,
>
>Does anyone know if the alternatives in the 'switch' function can be specified
>as strings containing spaces? Neither of the two approaches below works.
>
>
>switch(expr, "Choice 1"="My first choice", "Choice 2"="My 2nd choice", "Choice
>3"="My 3rd choice")
>
>
>x <- c("Choice 1", "Choice 2", "Choice 3")
>switch(expr, x[1]="My first choice", x[2]="My 2nd choice", x[3]="My 3rd
>choice")
>
>
>If the intended functionality can be achieved by a different function(s), I'd
>most appreciate such a suggestion as well.
>
>Many thanks,
>Mauricio
>
> [[alternative HTML version deleted]]
>
>
>______________________________________________
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>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
>
>
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