[R] looking for a cleaner way to do something

[Gabor Grothendieck]

Sorry there was an extra line in there.  It should be:

X <- structure(11:15, .Names = letters[1:5])
Y <- structure(21:25, .Names = letters[1:5])

tab <- rbind(group1 = X, group2 = Y)
tab[,-1] / tab[,1]


On 10/17/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> Try this:
>
> X <- structure(11:15, .Names = letters[1:5])
> Y <- structure(21:25, .Names = letters[1:5])
>
> rbind(group1 = X, group2 = Y)
> tab <- rbind(group1 = X, group2 = Y)
> tab[,-1] / tab[,1]
>
> On 10/17/06, Leeds, Mark (IED) <Mark.Leeds at morganstanley.com> wrote:
> > I have two numeric vectors each of length 17 and each is named the exact
> > same way.
> >
> > so
> >                obsnum ppppp  ppppm pppmp . dot dot dot......
> > temp1    is    1417    52         63       85
> >
> >                 obsnum ppppp  ppppm pppmp . dot dot dot......
> > temp2     is   1213     41        50       97
> >
> > what i want to have is a resultant matrix with 2 rows and 16 columns
> > where the 16 columns are the 2:17 columns divided by the respective
> > first element in each vector.
> > ( so 52, 63 and 85 should all get divided by 1417  and 41, 50 and 97
> > should all be divided by 1213 ).
> >
> > it doesn't have to retain the column names because i can just assign
> > them again when i am assigning the rownames.
> >
> > below is my  code :
> >
> > resultmatrix<-rbind(temp1,temp2)
> > resultmatrix<-resultmatrix[,2:17]/resultmatrix[,1]
> >
> > colnames(resultmatrix)<-colnames(temp1)
> > rownames(resultmatrix)<-c("group1","group2")
> >
> > I'm pretty sure above will work but it seemed kind of ugly and I
> > wondering if there is a better way because i am trying to improve in R.
> > if there isn't, that's fine. thanks.
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