[R] data manipulation function descriptions
kjetil brinchmann halvorsen
kjetil at entelnet.bo
Fri Feb 14 04:00:03 CET 2003
On 13 Feb 2003 at 17:09, Jason Bond wrote:
As lisp-stat user, I tried to compile a short dictionary within your
answer below:
> Hello,
>
> I'm a recovering xlispstat user, and am trying to become a good R
> user. I've looked around on the CRAN doc website and have found quite a
> few sets of documentation with various level of data manipulation function
> descriptions (of what I've seen, most relatively low levels), and many with
> examples of Rs use in statistical analyses. Although I don't expect to get
> my wish, ideally, it would be nice to have some sort of data manipulation
> function guide for programmers. I guess I'm somewhat of a different case,
> as I know which functions that I want to use...I just don't know their
> names...for example, all those great xlispstat functions like:
>
> remove-duplicates more or less unique()
> sort-data " sort()
> combine c()
> remove
x <- c(1,2,3,5,7,9,12,15, 18, 22)
x[-which(x==15)]
> reverse rev
> butlast
n <- length(x)
x[-n]
> first x[1] or for a list x[[1]]
> case switch
[R-core : switch should be better
announced. It is for
instance not
mentioned in "An
introduction to R"]
> which which
> mapcar apply, lapply, sapply
> map-elements nothing better than the ones above
> all the string functions paste, strwidth, strwrap, substr, toString
> and many many more,\
Kjetil Halvorsen
>
> descriptions of a few of which are spread out in various documents. Part
> of my problem is clinging to that which I know. Anyway, any general advice
> would be greatly appreciated.
>
> Jason
>
> At 03:57 PM 2/13/03 -0600, you wrote:
>
> >?which
> >
> >On Thursday 13 February 2003 03:40 pm, Jason Bond wrote:
> > > Hello. Sorry for the elementary post. I've looked through the
> > > documentation, but can't seem to find a function which allows one to
> > > extract the position of an element within a list...for example the position
> > > of the element 4 in the vector c(1,2,4,3,6) is 3. Thanks much for any
> > > help.
> > >
> > > Jason
> > >
> > > ______________________________________________
> > > R-help at stat.math.ethz.ch mailing list
> > > http://www.stat.math.ethz.ch/mailman/listinfo/r-help
>
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