[R] integrating 2 lists and a data frame in R

[Bogdan Tanasa]

Dear Bert,

thank you for your response. here it is the piece of R code : given 3 data
frames below ---

N <- data.frame(N=c("n1","n2","n3","n4"))

M <- data.frame(M=c("m1","m2","m3","m4","m5"))

C <- data.frame(n=c("n1","n2","n3"), m=c("m1","m1","m3"), I=c(100,300,400))

how shall I integrate N, and M, and C in such a way that at the end we have
a data frame with :


   - list N as the columns names
   - list M as the rows names
   - the values in the cells of N * M, corresponding to the numerical
   values in the data frame C.

more precisely, the result shall be :

     n1  n2  n3 n4
m1  100  200   -   -
m2   -   -   -   -
m3   -   -   300   -
m4   -   -   -   -
m5   -   -   -   -

thank you !


On Mon, Jun 5, 2017 at 6:57 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote:

> Reproducible example, please. -- In particular, what exactly does C look
> ilike?
>
> (You should know this by now).
>
> -- Bert
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Mon, Jun 5, 2017 at 6:45 PM, Bogdan Tanasa <tanasa at gmail.com> wrote:
> >  Dear all,
> >
> > please could you advise on the R code I could use in order to do the
> > following operation :
> >
> > a. -- I have 2 lists of "genome coordinates" : a list is composed by
> > numbers that represent genome coordinates;
> >
> > let's say list N :
> >
> > n1
> >
> > n2
> >
> > n3
> >
> > n4
> >
> > and a list M:
> >
> > m1
> >
> > m2
> >
> > m3
> >
> > m4
> >
> > m5
> >
> > 2 -- and a data frame C, where for some pairs of coordinates (n,m) from
> the
> > lists above, we have a numerical intensity;
> >
> > for example :
> >
> > n1; m1; 100
> >
> > n1; m2; 300
> >
> > The question would be : what is the most efficient R code I could use in
> > order to integrate the list N, the list M, and the data frame C, in order
> > to obtain a DATA FRAME,
> >
> > -- list N as the columns names
> > -- list M as the rows names
> > -- the values in the cells of N * M, corresponding to the numerical
> values
> > in the data frame C.
> >
> > A little example would be :
> >
> >       n1  n2  n3 n4
> >
> >       m1  100  -   -   -
> >
> >       m2  300  -   -   -
> >
> >       m3   -   -   -   -
> >
> >       m4   -   -   -   -
> >
> >       m5   -   -   -   -
> > I wrote a script in perl, although i would like to do this in R
> > Many thanks ;)
> > -- bogdan
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/
> posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>

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