R help - Jul 2009 - Function to standardize matriz?

Hi,
this is probably a very basic question but I'm just learning R and i
cannot find  a function to standardize a data matrix..
I'll be grateful for any tips or help you can provide me.

Thank you very much!

Did you mean this:
> m <- matrix(1:12, 3, 4)
> m / max(m)
           [,1]      [,2]      [,3]      [,4]
[1,] 0.08333333 0.3333333 0.5833333 0.8333333
[2,] 0.16666667 0.4166667 0.6666667 0.9166667
[3,] 0.25000000 0.5000000 0.7500000 1.0000000

On Thu, Jul 30, 2009 at 12:52 PM, Sam<samanta.fernandez at gmail.com>
wrote:
> Hi,
> this is probably a very basic question but I'm just learning R and i
> cannot find ?a function to standardize a data matrix..
> I'll be grateful for any tips or help you can provide me.
>
> Thank you very much!
>
> ______________________________________________
> 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.
>

scale? 

This transforms the columns of a matrix to z-scores.  That's one kind of
standardisation.


Bill Venables
http://www.cmis.csiro.au/bill.venables/ 


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Sam
Sent: Thursday, 30 July 2009 2:52 PM
To: r-help at r-project.org
Subject: [R] Function to standardize matriz?

Hi,
this is probably a very basic question but I'm just learning R and i
cannot find  a function to standardize a data matrix..
I'll be grateful for any tips or help you can provide me.

Thank you very much!

______________________________________________
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.

Dear Samanta,

Take a look at ?scale.

HTH,

Jorge


On Thu, Jul 30, 2009 at 12:52 AM, Sam <samanta.fernandez@gmail.com> wrote:
> Hi,
> this is probably a very basic question but I'm just learning R and i
> cannot find  a function to standardize a data matrix..
> I'll be grateful for any tips or help you can provide me.
>
> Thank you very much!
>
> ______________________________________________
> R-help@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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