R help - Aug 2009 - the problem about normalize the data frame

Hello,
I'd like to normalize a data frame which are "45000 obs. of  212
variables".I want to normalize the data frame by each row. But I
failed.Here is my R code,  can you tell me where am I wrong? >
bb<-function(normalize)
(dat[i,]-min(dat[i,]))/(max(dat[i,])-min(dat[i,]))> dat1<-apply(dat,1,bb)
Thanks!!
vie
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Hi Gina.

I am not sure your normalization process does what you want, but just to get
the code working, here is how it can be done:



# example data
my.data <- data.frame(rnorm(100,3,4), rnorm(100,3,4))

bb<-function(dat)
{
(dat-min(dat))/(max(dat)-min(dat))
}

dat1<-t(apply(my.data,1,bb))



Best,
Tal






On Wed, Aug 12, 2009 at 1:23 PM, Gina Liao <yi713@hotmail.com> wrote:
> > bb<-function(normalize)
> (dat[i,]-min(dat[i,]))/(max(dat[i,])-min(dat[i,]))>
dat1<-apply(dat,1,bb)
>


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