R help - Aug 2011 - reshape a matrix

Hi all,

I have a data.frame like following

A<-c('d0','d0','d1','d1','d2','d2')
B<-rep(c('control','sample'),3)
C<-c(rep(100000,2),200,300,400,500)
dataframe<-data.frame(A,B,C)

I want to reshape the matrix, so the matrix with 'd0', 'd1' and
'd2' in rows
and 'control' and 'sample' in columns. Is there a function for
doing this
easily?

Thank you in advance.

Wendy

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On 20.08.2011 17:04, Wendy wrote:
> Hi all,
>
> I have a data.frame like following
>
>
A<-c('d0','d0','d1','d1','d2','d2')
> B<-rep(c('control','sample'),3)
> C<-c(rep(100000,2),200,300,400,500)
> dataframe<-data.frame(A,B,C)
>
> I want to reshape the matrix, so the matrix with 'd0', 'd1'
and 'd2' in rows
> and 'control' and 'sample' in columns. Is there a function
for doing this
> easily?
See ?reshape

reshape(data=dataframe, idvar="A", timevar="B",
direction="wide")

Uwe Ligges



>
> Thank you in advance.
>
> Wendy
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/reshape-a-matrix-tp3757179p3757179.html
> Sent from the R help mailing list archive at Nabble.com.
>
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On 21/08/11 03:04, Wendy wrote:
> Hi all,
>
> I have a data.frame like following
>
>
A<-c('d0','d0','d1','d1','d2','d2')
> B<-rep(c('control','sample'),3)
> C<-c(rep(100000,2),200,300,400,500)
> dataframe<-data.frame(A,B,C)
>
> I want to reshape the matrix, so the matrix with 'd0', 'd1'
and 'd2' in rows
> and 'control' and 'sample' in columns. Is there a function
for doing this
> easily?
Your question has been answered .... But if you remember that a *matrix*
and a *data frame* are ***NOT*** the same thing, you'll get into a lot less
trouble.  Why do you think there are two *different* terms for these sorts
of object if they are the same thing?  Psigh!!!

     cheers,

         Rolf Turner