[R] saving while loop values to one vector

[Gabor Grothendieck]

On Dec 24, 2007 1:08 PM, Syed Abid Hussaini <ohitsabid at yahoo.com> wrote:
> Thanks Gabor!
>   I never realized there could be a "diff" function. all i was trying to do was to calculate the
> iterated differences in a vector. I feel so embarassed, but so happy for using R.
> by the way, i used
> "wave2 <- sort (wave2, decreasing=F)" to sort the values non-decreasingly because the code "i <-

That is the default for sort.   Its not necessary to specify defaults.
 Also its better practice to
write out F as FALSE since F can be a variable in R but FALSE cannot be.

> findInterval((wave2[1]), wave2)" doesnt work without this sorting.
> But all that is past now since i found the diff function.
>
> Thanks again.
>
> abid
>
> > > From: "Gabor Grothendieck" <ggrothendieck at gmail.com>
> > CC: R-help at stat.math.ethz.ch
> > To: "Syed Abid Hussaini" <ohitsabid at yahoo.com>
> > Date: Mon, 24 Dec 2007 02:30:57 -0500
> > Subject: Re: [R] saving while loop values to one vector
>
> >
> > Its not clear what your code is intended to do but
> >
> > - put set.seed(123) before your code so you can
> > run it reproducibly.
> >
> > - wave2 <- sort(abs(rnorm(100))) is the same as your first
> > two lines
> >
> > - your findInterval line always returns 1 so its probably not what you want
> >
> > - i in i:x is confusing. Use j in i:x or even better use diff(wave2).
> >
> > On Dec 24, 2007 1:54 AM, Syed Abid Hussaini <ohitsabid at yahoo.com> wrote:
> > > I solved it myself by reading the help files which i should have done prior to my posting.
> > >
> > > Solution:
> > >
> > > wave2 <- abs(Re(rnorm(100)))
> > > wave2 <- sort (wave2, decreasing=F)
> > > hist(wave2)
> > > x <- length (wave2)
> > > i <- findInterval((wave2[1]), wave2)
> > > i <- i+1
> > > out <- numeric(x)
> > > for (i in i:x)  {
> > > out[i] <- (wave2 [i] - wave2[i-1])
> > > }
> > > out
> > >
> > > As you see i trimmed the code and alloted a new variable called out which i later save my
> > values
> > > to.
> > >
> > >
> > >
> > > --- Syed Abid Hussaini <ohitsabid at yahoo.com> wrote:
> > >
> > > > Hi all,
> > > >   I am pretty new to R and even new to programming in general. Right now i get only one
> > value
> > > > for
> > > > j below (print(j)), how do i save all j values to one vector or matrix? Sorry for this very
> > > > basic
> > > > question. thanks in advance.
> > > >
> > > > wave2 <- abs(Re(rnorm(100)))
> > > > i <- findInterval((wave2[1]), wave2)
> > > > i <- i+1
> > > >
> > > > while (i < length(wave2))  {
> > > > j <- (wave2 [i] - wave2[i-1])
> > > > print(j)
> > > > i<-i+1
> > > > }
> > > >
> > > > abid
> > > >
> > > >
> > > >
>
>
>
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