On Sun, 13 Jul 2008, Fran100681 wrote:
Thank you, but this is not what i want exactly.. i would want to launch
function "myfun" with this script:
table <- sample(LETTERS[1:5], 20,TRUE)
name <- "A"
myfun <- function(name) {
+ r <- grep (name[^0-9], table )
...............XXXXXXXXXX............
This is not correct syntax. And likely R told you so.
If you intend "name[^0-9]" to be read as character, you need to quote it.
Perhaps you want a more complicated regex than the one Jim handed you,
like
name <- "A[^0-9]"
??
+ return (r) }
but if I do it ,R doesn't accept this.. i want this because i have in
"table" (a data frame) ,a list of element that are "hsa-mir-N" (when N is
any number)..so, if i put in argument "name" this is: "hsa-mir-70" ,function
matches hsa-mir-70, but also (for instance) hsa-mir-700, 710 724 and so
on... infact i insert a square brackets ^0-9 to exclude any other number
after those i have given (in "name").. It's a little complex situation.. :(
p.s: i can't put in "name" simply: hsa-mir-20 to match all hsa-mir-20 in the
data frame because i need to match hsa-mir-20 but also (for instance)
hsa-mir-20-3... or hsa-mir-20b, hsa-mir-20a..... and not those elements with
another number after the 20
jholtman wrote:
I think this is what you want
table <- sample(LETTERS[1:5], 20,TRUE)
name <- "A"
myfun <- function(name) {
+ r <- grep (name, table )
+ return (r) }
myfun(name)
[1] 4 7 14 18
table
[1] "E" "B" "D" "A" "B" "B" "A" "B" "E" "B" "C" "C" "C" "A" "E" "D"
"D" "A" "D" "C"
On Fri, Jul 11, 2008 at 1:57 PM, Fran100681 <[EMAIL PROTECTED]> wrote:
Hello everybody!
I'm using R and I have a little problem about function "grep". I 've got
to
make a new function in which "grep" is present. So the first argument of
"grep" is the string we want to find,ok..but in this case I define a
function "x" before , x receives an argument in a object "name" (for
instance), then inside function "x" ,i define a grep.. so i want to set
as
pattern (1st argument of grep) what i put in "name" and not the string
"name"... how do i do that?
ex:
name <- "Tom"
myfun <- function(name) {
r <- grep ("name", table )
return (r) }
It returns nothing because it searches the word "name" in "table" rather
"Tom"...
I hope to receive some little help because this is stopping me in my
projcet
:/ ... i m'not able to reach a solution! Thanks a lot!
--
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______________________________________________
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--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
______________________________________________
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PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
--
View this message in context:
http://www.nabble.com/Difficultes-with-grep-tp18409347p18428404.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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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.
Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:[EMAIL PROTECTED] UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
______________________________________________
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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.
