R help - Jan 2010 - Apply a function on an array with the parameter as an array

Hello R buddies, I want to apply a function on an array but for each element
of the array I want to use a different parameter, So here is how I tried to
enter the function:
apply(as.matrix(X),2, function, parameter1 = arrayOfParameter)
I put X as a matrix because it was initially an element of a list. It
returns me an array with the same length as X but with values that I don't
even understand...Can someone please help me?
-- 
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Sent from the R help mailing list archive at Nabble.com.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of anna
Sent: Tuesday, January 26, 2010 11:48 AM
To: r-help at r-project.org
Subject: [R] Apply a function on an array with the parameter as an array


Hello R buddies, I want to apply a function on an array but for each element
of the array I want to use a different parameter, So here is how I tried to
enter the function:
apply(as.matrix(X),2, function, parameter1 = arrayOfParameter)
I put X as a matrix because it was initially an element of a list. It
returns me an array with the same length as X but with values that I don't
even understand...Can someone please help me?


-- Probably not. You haven't read and followed the posting guide and
provided a small reproducible example so we know exactly what you tried to
do.

Bert Gunter
Genentech Nonclinical Statistics

I perhaps should have added that the etiquette of this list is to supply
your correct name in your signature. This does not necessarily mean that you
will be ignored if you fail to do so, but it does increase the likelihood
that you will be.


Bert Gunter
Genentech Nonclinical Biostatistics

You can do something like this:

lapply(1:nrow(X), function(.indx, param){
    X[.indx,] * param[.indx]  # apply param[i] to row i of X
}, param=arrayOf Params)


On Tue, Jan 26, 2010 at 3:52 PM, anna <lippelanna24 at hotmail.com>
wrote:
>
> Ok, I read the entire posting guide and updated my signature. So I come
back
> on my question, should I use an apply in an apply to make this?
>
> -----
> Anna Lippel
> --
> View this message in context:
http://n4.nabble.com/Apply-a-function-on-an-array-with-the-parameter-as-an-array-tp1310834p1310922.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 that you are trying to solve?