[R] How could I use a function saved in one file ?

[Bill.Venables at csiro.au]

Try using

source("P_Value")

before anything else.

Also, P_Value can be written as a one-liner:

P_Value <- function(Table) fisher.test(Table)$p.value

so you don't really need a separate function at all.

Bill Venables
CSIRO/CMIS Cleveland Laboratories


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of A-A_lowie li
Sent: Monday, 3 May 2010 4:20 AM
To: r-help at r-project.org
Subject: [R] How could I use a function saved in one file ?

Dear All:

        I create a file named :"P_Value" with only one simple function:

        P_Value <- function( Table ) {
            S = fisher.test(Table, alternative = "two.sided");
            return(S$p.value);
        }

        However, it seems that it's impossible to use this function
directly, because no matter
        where I save this file, R always reports a missing function. For
example,

       > M = matrix(c(25194,2783,307,20),2)
       > P_Value(M)
       Error: could not find function "P_Value"

       Sincerely thanks a lot for any suggestions.

Lowie

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