On Aug 16, 2011, at 4:53 PM, Mauricio Cornejo 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
Right... and what might that be... in a natural language if you
please. Deducing intention from failed efforts in a computer language
are a request for mind-reading.
(Puts envelope to forehead. The answer is probably .... ?match )
switch() is designed to dispatch to a function call. match() is
designed to return an item from a vector.
can be achieved by a different function(s), I'd most appreciate such
a suggestion as well.
> x <- c("Choice 1", "Choice 2", "Choice 3")
> x <- c("Choice 1", "Choice 2", "Choice 3")
> match("Choice 2", x)
{1] 2 # returns a vector easily used as index to another vector
> c("My first choice", "My 2nd choice","My 3rd choice")
[ match("Choice 2", x)]
[1] "My 2nd choice"
David Winsemius, MD
West Hartford, CT
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