Re: [R] operation with if/else on a dataframe

Ok, thank you a lot!! Bernardo Rangel tura wrote: > > On Thu, 2009-10-29 at 01:47 -0700, Fran100681 wrote: >> Hi to all, >> I have this dataframe (I show the first six rows) >> >> >head(table) >> >> A

[R] Invert the sign of a number

Hello, just a simple question How can I do to invert the sign of a number? (for example: -4 to 4, 2 to -2 and so on..) I was looking for a specific function in R but I didn't found it... thank you Francesco -- View this message in context: http://www.nabble.com/Invert-the-sign-of-a-number-tp2

[R] operation with if/else on a dataframe

Hi to all, I have this dataframe (I show the first six rows) >head(table) A RFold.Change P.Value Count1 Count2 1 ENSRNOE002_at 0 1.13 0.601 1 2 ENSRNOE009_at 0-

Re: [R] Difficultes with grep

Thank you very much for all messages and answers, it's ok now :) Charles C. Berry wrote: > > 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 scrip

Re: [R] Difficultes with grep

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"

[R] Difficultes with grep

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