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Gianni Burgin

2007-Aug-16 11:01 UTC

[R] Combine matrix

Hi R user,

I am new to R, and I have a very simple question for you. I have two matrix
A and B, with internally redundant rownames (but variables are different).
Some, but not all the rownames are shared among the two matrix. I want to
create a greater matrix that combines the previuos two, and has all the
possible combinations of matching rownames lines among matrix A and B.

looking for the solution I bumped in merge but actually works on data.frame,
and in dataframe there could be no redundancy in names.


can you help me??

	[[alternative HTML version deleted]]

Gianni Burgin

2007-Aug-16 13:20 UTC

head link

[R] Combine matrix

let say something like this

>a=matrix(1:25, nrow=5)
>rownames(a)=letters[1:5]
> colnames(a)=rep("A", 5)
> a  A  A  A  A  A
a 1  6 11 16 21
b 2  7 12 17 22
c 3  8 13 18 23
d 4  9 14 19 24
e 5 10 15 20 25
> b=matrix(1:40, nrow=8)
> rownames(b)=c(rep("a",4),rep("b",4))
> colnames(b)=rep("B", 5)
> b  B  B  B  B  B
a 1  9 17 25 33
a 2 10 18 26 34
a 3 11 19 27 35
a 4 12 20 28 36
b 5 13 21 29 37
b 6 14 22 30 38
b 7 15 23 31 39
b 8 16 24 32 40

as a results I wold like something like

  A  A  A  A  A  B  B  B  B  B
a 1  6 11 16 21  1  9 17 25 33
a 1  6 11 16 21  2 10 18 26 34
a 1  6 11 16 21  3 11 19 27 35
a 1  6 11 16 21  4 12 20 28 36
b 2  7 12 17 22  5 13 21 29 37
b 2  7 12 17 22  6 14 22 30 38
b 2  7 12 17 22  7 15 23 31 39
b 2  7 12 17 22  8 16 24 32 40


does it is clear? is there a function that automate this operation?


thank you very much!




On 8/16/07, jim holtman <jholtman@gmail.com>
wrote:>
> Can you provide an example of what you mean; e.g., the two input
> matrices and the desired output.
>
> On 8/16/07, Gianni Burgin <gianni.burgin@gmail.com> wrote:
> > Hi R user,
> >
> > I am new to R, and I have a very simple question for you. I have two
> matrix
> > A and B, with internally redundant rownames (but variables are
> different).
> > Some, but not all the rownames are shared among the two matrix. I want
> to
> > create a greater matrix that combines the previuos two, and has all
the
> > possible combinations of matching rownames lines among matrix A and B.
> >
> > looking for the solution I bumped in merge but actually works on
> data.frame,
> > and in dataframe there could be no redundancy in names.
> >
> >
> > can you help me??
> >
> >        [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@stat.math.ethz.ch mailing list
> > 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.
> >
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem you are trying to solve?
>
	[[alternative HTML version deleted]]

François Pinard

2007-Aug-16 13:48 UTC

head link

[R] Combine matrix

[Gianni Burgin]>let say something like this
>>a=matrix(1:25, nrow=5)
>>rownames(a)=letters[1:5]
>> colnames(a)=rep("A", 5)
>> a
>  A  A  A  A  A
>a 1  6 11 16 21
>b 2  7 12 17 22
>c 3  8 13 18 23
>d 4  9 14 19 24
>e 5 10 15 20 25
>> b=matrix(1:40, nrow=8)
>> rownames(b)=c(rep("a",4),rep("b",4))
>> colnames(b)=rep("B", 5)
>> b
>  B  B  B  B  B
>a 1  9 17 25 33
>a 2 10 18 26 34
>a 3 11 19 27 35
>a 4 12 20 28 36
>b 5 13 21 29 37
>b 6 14 22 30 38
>b 7 15 23 31 39
>b 8 16 24 32 40
>as a results I wold like something like
>  A  A  A  A  A  B  B  B  B  B
>a 1  6 11 16 21  1  9 17 25 33
>a 1  6 11 16 21  2 10 18 26 34
>a 1  6 11 16 21  3 11 19 27 35
>a 1  6 11 16 21  4 12 20 28 36
>b 2  7 12 17 22  5 13 21 29 37
>b 2  7 12 17 22  6 14 22 30 38
>b 2  7 12 17 22  7 15 23 31 39
>b 2  7 12 17 22  8 16 24 32 40
>does it is clear? is there a function that automate this operation?
Like, maybe:

   cbind(a[rownames(b),], b)



-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca

Moshe Olshansky

2007-Aug-17 02:00 UTC

head link

[R] Combine matrix

This does not work in the general case. To see this,
try:
rownames(a}[5] <- "a"
and see what happens then.

--- Fran?ois Pinard <pinard at iro.umontreal.ca> wrote:
> [Gianni Burgin]
> >let say something like this
> 
> >>a=matrix(1:25, nrow=5)
> 
> >>rownames(a)=letters[1:5]
> >> colnames(a)=rep("A", 5)
> 
> >> a
> >  A  A  A  A  A
> >a 1  6 11 16 21
> >b 2  7 12 17 22
> >c 3  8 13 18 23
> >d 4  9 14 19 24
> >e 5 10 15 20 25
> 
> >> b=matrix(1:40, nrow=8)
> >> rownames(b)=c(rep("a",4),rep("b",4))
> >> colnames(b)=rep("B", 5)
> 
> >> b
> >  B  B  B  B  B
> >a 1  9 17 25 33
> >a 2 10 18 26 34
> >a 3 11 19 27 35
> >a 4 12 20 28 36
> >b 5 13 21 29 37
> >b 6 14 22 30 38
> >b 7 15 23 31 39
> >b 8 16 24 32 40
> 
> >as a results I wold like something like
> 
> >  A  A  A  A  A  B  B  B  B  B
> >a 1  6 11 16 21  1  9 17 25 33
> >a 1  6 11 16 21  2 10 18 26 34
> >a 1  6 11 16 21  3 11 19 27 35
> >a 1  6 11 16 21  4 12 20 28 36
> >b 2  7 12 17 22  5 13 21 29 37
> >b 2  7 12 17 22  6 14 22 30 38
> >b 2  7 12 17 22  7 15 23 31 39
> >b 2  7 12 17 22  8 16 24 32 40
> 
> >does it is clear? is there a function that automate
> this operation?
> 
> Like, maybe:
> 
>    cbind(a[rownames(b),], b)
> 
> 
> 
> -- 
> Fran?ois Pinard   http://pinard.progiciels-bpi.ca
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> 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.
>

Gabor Grothendieck

2007-Aug-17 03:18 UTC

head link

[R] Combine matrix

Try this.  We convert to data frame placing the row names in column 1, do
the merge, remove column 1 and convert back to matrix:

# test input
a <- matrix(1:25, nrow = 5,
  dimnames = list(letters[1:5], rep("A", 5)))
b <- matrix(1:40, nrow = 8,
  dimnames = list(rep(letters[1:2], each = 4), rep("B", 5)))

# 1. process
to.DF <- function(x) data.frame(rn = row.names(x), x, row.names = 1:nrow(x))
out <- as.matrix(merge(to.DF(a), to.DF(b), by = 1)[,-1])
colnames(out) <- c(colnames(a), colnames(b))
out

# 2. same but merge is done using sqldf
# assume same a, b and to.DF as before

library(sqldf)
DFa <- to.DF(a)
DFb <- to.DF(b)
out <- as.matrix(sqldf("select * from DFa join DFb using(rn)")[-1])
colnames(out) <- c(colnames(a), colnames(b))
out


# 3. same but uses sqldf and proto (which sqldf automatically loads)
# assume same a, b and to.DF as before

library(sqldf)
out <- as.matrix(sqldf("select * from a join b using(rn)",
  envir = proto(a = to.DF(a), b = to.DF(b)))[-1])
colnames(out) <- c(colnames(a), colnames(b))
out




On 8/16/07, Gianni Burgin <gianni.burgin at gmail.com>
wrote:> let say something like this
>
>
> >a=matrix(1:25, nrow=5)
>
> >rownames(a)=letters[1:5]
> > colnames(a)=rep("A", 5)
>
> > a
>  A  A  A  A  A
> a 1  6 11 16 21
> b 2  7 12 17 22
> c 3  8 13 18 23
> d 4  9 14 19 24
> e 5 10 15 20 25
>
> > b=matrix(1:40, nrow=8)
> > rownames(b)=c(rep("a",4),rep("b",4))
> > colnames(b)=rep("B", 5)
>
> > b
>  B  B  B  B  B
> a 1  9 17 25 33
> a 2 10 18 26 34
> a 3 11 19 27 35
> a 4 12 20 28 36
> b 5 13 21 29 37
> b 6 14 22 30 38
> b 7 15 23 31 39
> b 8 16 24 32 40
>
> as a results I wold like something like
>
>  A  A  A  A  A  B  B  B  B  B
> a 1  6 11 16 21  1  9 17 25 33
> a 1  6 11 16 21  2 10 18 26 34
> a 1  6 11 16 21  3 11 19 27 35
> a 1  6 11 16 21  4 12 20 28 36
> b 2  7 12 17 22  5 13 21 29 37
> b 2  7 12 17 22  6 14 22 30 38
> b 2  7 12 17 22  7 15 23 31 39
> b 2  7 12 17 22  8 16 24 32 40
>
>
> does it is clear? is there a function that automate this operation?
>
>
> thank you very much!
>
>
>
>
> On 8/16/07, jim holtman <jholtman at gmail.com> wrote:
> >
> > Can you provide an example of what you mean; e.g., the two input
> > matrices and the desired output.
> >
> > On 8/16/07, Gianni Burgin <gianni.burgin at gmail.com> wrote:
> > > Hi R user,
> > >
> > > I am new to R, and I have a very simple question for you. I have
two
> > matrix
> > > A and B, with internally redundant rownames (but variables are
> > different).
> > > Some, but not all the rownames are shared among the two matrix. I
want
> > to
> > > create a greater matrix that combines the previuos two, and has
all the
> > > possible combinations of matching rownames lines among matrix A
and B.
> > >
> > > looking for the solution I bumped in merge but actually works on
> > data.frame,
> > > and in dataframe there could be no redundancy in names.
> > >
> > >
> > > can you help me??
> > >
> > >        [[alternative HTML version deleted]]
> > >
> > > ______________________________________________
> > > R-help at stat.math.ethz.ch mailing list
> > > 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.
> > >
> >
> >
> > --
> > Jim Holtman
> > Cincinnati, OH
> > +1 513 646 9390
> >
> > What is the problem you are trying to solve?
> >
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> 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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