R help - May 2010 - 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

-- 
Without dream, life is incomplete!

	[[alternative HTML version deleted]]

Dear Lowie,

To use a function in R that you have saved in a file, you need to
source it in first (see ?source).  Try this,

source(file="pathtoyourfile/P_Value.R") #or whatever your file is
named exactly

Once you do that, you should be able to use your function.  If you
always want it to load at startup, you can modify your Rprofile, I
believe. (see ?Rprofile)


Josh

On Sun, May 2, 2010 at 11:19 AM, A-A_lowie li <lowieli at gmail.com>
wrote:
> 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
>
> --
> Without dream, life is incomplete!
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>


-- 
Joshua Wiley
Senior in Psychology
University of California, Riverside
http://www.joshuawiley.com/

Lowie,

You can save the function in a file called
'P_value.txt' or something like it
(I prefer 'P_value.r').
Then you load the function into your R session by
Using:
Source("P_value.txt",sep="")  ).

It is better if you keep all your R functions into
The same directory, say directory "my_rfunc",
Then you load your function using:
Source(paste(my_rfunc,"P_value.txt",sep="")  )

Hope it helps,

Augusto


--------------------------------------------
Augusto Sanabria. MSc, PhD.
Mathematical Modeller
Risk & Impact Analysis Group
Geospatial & Earth Monitoring Division
Geoscience Australia (www.ga.gov.au)
Cnr. Jerrabomberra Av. & Hindmarsh Dr.
Symonston ACT 2601
Ph. (02) 6249-9155






-----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
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

--
Without dream, life is incomplete!

        [[alternative HTML version deleted]]

______________________________________________
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.

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

-- 
Without dream, life is incomplete!

	[[alternative HTML version deleted]]

______________________________________________
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.