[R] Difficultes with grep

[Fran100681]

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 )
+ 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 <franaruto at hotmail.it> 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!
>> --
>> View this message in context:
>> http://www.nabble.com/Difficultes-with-grep-tp18409347p18409347.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
> 
> 
> 
> -- 
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
> 
> What is the problem you are trying to solve?
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> 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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