Re: [R] Passing colnames to graphics title
Either set the 'main' or 'xlab' in the hist(). See help("par") for more
information on graphical arguments or help("hist").
mat <- matrix( rnorm(1000), nc=5 )
colnames(mat) <- LETTERS[1:ncol(mat)]
for( i in 1:ncol(mat) ){
hist( mat[ ,i],
main=paste( "Histogram of data from column ",
colnames(mat)[i] ), xlab="" )
}
On Wed, 2005-02-16 at 13:56 +, Laura Quinn wrote:
> Hi,
>
> Just a quick query - if I'm creating a function to produce a number of
> histograms per page of output (one per column from a matrix), how can I
> pass the column name of the matrix into the title (or indeed to form part
> of the x-axis label)?
>
> TIA,
> Laura
>
> Laura Quinn
> Institute of Atmospheric Science
> School of Earth and Environment
> University of Leeds
> Leeds
> LS2 9JT
>
> tel: +44 113 343 1596
> fax: +44 113 343 6716
> mail: [EMAIL PROTECTED]
>
> __
> 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
>
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RE: [R] Passing colnames to graphics title
Dear Laura,
It doesn't make sense to call colnames() with the loop index; you could do
something like (for the matrix or data frame X):
par(mfrow=c(1, ncol(X)))
names <- colnames(X)
for (i in seq(along=names)) hist(X[,i], main="", xlab=paste("Site:",
names[i]))
I hope this helps,
John
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Laura Quinn
> Sent: Wednesday, February 16, 2005 9:47 AM
> To: Uwe Ligges
> Cc: r-help@stat.math.ethz.ch
> Subject: Re: [R] Passing colnames to graphics title
>
> Obviously I have been trying to use the colnames() function!
>
> However, when I try to subscript ie:
>
> for(i in 1:20){
> main=paste("Site:",colnames(i),sep="")
> }
>
> this doesn't work! I thought that as.character(colnames(i)) or
> substitute(colnames(i)) might work, but to no avail...
>
> Laura Quinn
> Institute of Atmospheric Science
> School of Earth and Environment
> University of Leeds
> Leeds
> LS2 9JT
>
> tel: +44 113 343 1596
> fax: +44 113 343 6716
> mail: [EMAIL PROTECTED]
>
> On Wed, 16 Feb 2005, Uwe Ligges wrote:
>
> > Laura Quinn wrote:
> >
> > > Hi,
> > >
> > > Just a quick query - if I'm creating a function to
> produce a number
> > > of histograms per page of output (one per column from a
> matrix), how
> > > can I pass the column name of the matrix into the title
> (or indeed
> > > to form part of the x-axis label)?
> >
> >
> > By extracting them using colnames()?
> >
> > Uwe Ligges
> >
> >
> >
> > > TIA,
> > > Laura
> > >
> > > Laura Quinn
> > > Institute of Atmospheric Science
> > > School of Earth and Environment
> > > University of Leeds
> > > Leeds
> > > LS2 9JT
> > >
> > > tel: +44 113 343 1596
> > > fax: +44 113 343 6716
> > > mail: [EMAIL PROTECTED]
> > >
> > > __
> > > 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
> >
> >
>
> __
> 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
__
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RE: [R] Passing colnames to graphics title
If i is 1:20, there are no column names. Make sure you are indexing the
names from your your dataframe.
> xx <- data.frame(a=c(1:10), b = letters[1:10])
> colnames(xx)
[1] "a" "b"
> for(i in 1:2) print(colnames(xx)[i])
[1] "a"
[1] "b"
> for(i in colnames(xx)) print(i)
[1] "a"
[1] "b"
Matt Austin
Statistician
Amgen
One Amgen Center Drive
M/S 24-2-C
Thousand Oaks CA 93021
(805) 447 - 7431
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Laura Quinn
> Sent: Wednesday, February 16, 2005 6:47 AM
> To: Uwe Ligges
> Cc: r-help@stat.math.ethz.ch
> Subject: Re: [R] Passing colnames to graphics title
>
>
> Obviously I have been trying to use the colnames() function!
>
> However, when I try to subscript ie:
>
> for(i in 1:20){
> main=paste("Site:",colnames(i),sep="")
> }
>
> this doesn't work! I thought that as.character(colnames(i)) or
> substitute(colnames(i)) might work, but to no avail...
>
> Laura Quinn
> Institute of Atmospheric Science
> School of Earth and Environment
> University of Leeds
> Leeds
> LS2 9JT
>
> tel: +44 113 343 1596
> fax: +44 113 343 6716
> mail: [EMAIL PROTECTED]
>
> On Wed, 16 Feb 2005, Uwe Ligges wrote:
>
> > Laura Quinn wrote:
> >
> > > Hi,
> > >
> > > Just a quick query - if I'm creating a function to
> produce a number of
> > > histograms per page of output (one per column from a
> matrix), how can I
> > > pass the column name of the matrix into the title (or
> indeed to form part
> > > of the x-axis label)?
> >
> >
> > By extracting them using colnames()?
> >
> > Uwe Ligges
> >
> >
> >
> > > TIA,
> > > Laura
> > >
> > > Laura Quinn
> > > Institute of Atmospheric Science
> > > School of Earth and Environment
> > > University of Leeds
> > > Leeds
> > > LS2 9JT
> > >
> > > tel: +44 113 343 1596
> > > fax: +44 113 343 6716
> > > mail: [EMAIL PROTECTED]
> > >
> > > __
> > > 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
>
>
__
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Re: [R] Passing colnames to graphics title
On Wed, Feb 16, 2005 at 02:46:51PM +, Laura Quinn wrote:
> Obviously I have been trying to use the colnames() function!
>
> However, when I try to subscript ie:
>
> for(i in 1:20){
> main=paste("Site:",colnames(i),sep="")
^^^
it looks to me that this should be something like
colnames(foo)[i]
where foo is the matrix or data.frame you use.
Best regards, Jan
--
+- Jan T. Kim ---+
|*NEW*email: [EMAIL PROTECTED] |
|*NEW*WWW: http://www.cmp.uea.ac.uk/people/jtk |
*-=< hierarchical systems are for files, not for humans >=-*
__
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Re: [R] Passing colnames to graphics title
Laura Quinn wrote:
Obviously I have been trying to use the colnames() function!
However, when I try to subscript ie:
for(i in 1:20){
main=paste("Site:",colnames(i),sep="")
}
this doesn't work! I thought that as.character(colnames(i)) or
substitute(colnames(i)) might work, but to no avail...
Laura,
You should (re)read ?colnames. It takes a matrix as it's argument, not
an integer as you have supplied.
I think you want:
for(i in 1:20){
main=paste("Site:",colnames(mat)[i],sep="")
}
--sundar
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
On Wed, 16 Feb 2005, Uwe Ligges wrote:
Laura Quinn wrote:
Hi,
Just a quick query - if I'm creating a function to produce a number of
histograms per page of output (one per column from a matrix), how can I
pass the column name of the matrix into the title (or indeed to form part
of the x-axis label)?
By extracting them using colnames()?
Uwe Ligges
TIA,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
__
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
__
R-help@stat.math.ethz.ch mailing list
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PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
__
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PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Passing colnames to graphics title
Uwe Ligges wrote:
Laura Quinn wrote:
Obviously I have been trying to use the colnames() function!
However, when I try to subscript ie:
for(i in 1:20){
main=paste("Site:",colnames(i),sep="")
}
BTW: colnames(i) is the same as colnames(1) in the first iteration of
your loop. What do you expect colnames(1) to be?
Uwe Ligges
Example (which you should have provided):
# Generate an example-matrix:
X <- matrix(1:9, 3)
colnames(X) <- letters[1:3]
# now try to get histograms of columns using a loop:
par(mfrow = c(3, 1))
cnames <- colnames(X)
for(i in 1:ncol(X)){
hist(X[,i], main = paste("Site:", cnames[i], sep=""))
}
Uwe Ligges
this doesn't work! I thought that as.character(colnames(i)) or
substitute(colnames(i)) might work, but to no avail...
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
On Wed, 16 Feb 2005, Uwe Ligges wrote:
Laura Quinn wrote:
Hi,
Just a quick query - if I'm creating a function to produce a number of
histograms per page of output (one per column from a matrix), how can I
pass the column name of the matrix into the title (or indeed to form
part
of the x-axis label)?
By extracting them using colnames()?
Uwe Ligges
TIA,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
__
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
__
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
Re: [R] Passing colnames to graphics title
Laura Quinn wrote:
Obviously I have been trying to use the colnames() function!
However, when I try to subscript ie:
for(i in 1:20){
main=paste("Site:",colnames(i),sep="")
}
Example (which you should have provided):
# Generate an example-matrix:
X <- matrix(1:9, 3)
colnames(X) <- letters[1:3]
# now try to get histograms of columns using a loop:
par(mfrow = c(3, 1))
cnames <- colnames(X)
for(i in 1:ncol(X)){
hist(X[,i], main = paste("Site:", cnames[i], sep=""))
}
Uwe Ligges
this doesn't work! I thought that as.character(colnames(i)) or
substitute(colnames(i)) might work, but to no avail...
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
On Wed, 16 Feb 2005, Uwe Ligges wrote:
Laura Quinn wrote:
Hi,
Just a quick query - if I'm creating a function to produce a number of
histograms per page of output (one per column from a matrix), how can I
pass the column name of the matrix into the title (or indeed to form part
of the x-axis label)?
By extracting them using colnames()?
Uwe Ligges
TIA,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
__
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
__
R-help@stat.math.ethz.ch mailing list
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PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Passing colnames to graphics title
Wonderful, thank you very much!
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
On Wed, 16 Feb 2005, Dimitris Rizopoulos wrote:
> a simple thing to do is:
>
> mat <- matrix(...) # your matrix
> nams <- dimnames(mat)[[2]]
> for(j in 1:ncol(mat)) hist(mat[,j], main=nams[j])
> # or hist(mat[,j], xlab=paste("...", nams[j], "..."))
>
> I hope it helps.
>
> Best,
> Dimitris
>
>
> Dimitris Rizopoulos
> Ph.D. Student
> Biostatistical Centre
> School of Public Health
> Catholic University of Leuven
>
> Address: Kapucijnenvoer 35, Leuven, Belgium
> Tel: +32/16/336899
> Fax: +32/16/337015
> Web: http://www.med.kuleuven.ac.be/biostat/
> http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
>
>
> - Original Message -
> From: "Laura Quinn" <[EMAIL PROTECTED]>
> To:
> Sent: Wednesday, February 16, 2005 2:56 PM
> Subject: [R] Passing colnames to graphics title
>
>
> > Hi,
> >
> > Just a quick query - if I'm creating a function to produce a number
> > of
> > histograms per page of output (one per column from a matrix), how
> > can I
> > pass the column name of the matrix into the title (or indeed to form
> > part
> > of the x-axis label)?
> >
> > TIA,
> > Laura
> >
> > Laura Quinn
> > Institute of Atmospheric Science
> > School of Earth and Environment
> > University of Leeds
> > Leeds
> > LS2 9JT
> >
> > tel: +44 113 343 1596
> > fax: +44 113 343 6716
> > mail: [EMAIL PROTECTED]
> >
> > __
> > 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
> >
>
>
__
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
Re: [R] Passing colnames to graphics title
Obviously I have been trying to use the colnames() function!
However, when I try to subscript ie:
for(i in 1:20){
main=paste("Site:",colnames(i),sep="")
}
this doesn't work! I thought that as.character(colnames(i)) or
substitute(colnames(i)) might work, but to no avail...
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
On Wed, 16 Feb 2005, Uwe Ligges wrote:
> Laura Quinn wrote:
>
> > Hi,
> >
> > Just a quick query - if I'm creating a function to produce a number of
> > histograms per page of output (one per column from a matrix), how can I
> > pass the column name of the matrix into the title (or indeed to form part
> > of the x-axis label)?
>
>
> By extracting them using colnames()?
>
> Uwe Ligges
>
>
>
> > TIA,
> > Laura
> >
> > Laura Quinn
> > Institute of Atmospheric Science
> > School of Earth and Environment
> > University of Leeds
> > Leeds
> > LS2 9JT
> >
> > tel: +44 113 343 1596
> > fax: +44 113 343 6716
> > mail: [EMAIL PROTECTED]
> >
> > __
> > 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
>
>
__
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
Re: [R] Passing colnames to graphics title
a simple thing to do is:
mat <- matrix(...) # your matrix
nams <- dimnames(mat)[[2]]
for(j in 1:ncol(mat)) hist(mat[,j], main=nams[j])
# or hist(mat[,j], xlab=paste("...", nams[j], "..."))
I hope it helps.
Best,
Dimitris
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
- Original Message -
From: "Laura Quinn" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, February 16, 2005 2:56 PM
Subject: [R] Passing colnames to graphics title
Hi,
Just a quick query - if I'm creating a function to produce a number
of
histograms per page of output (one per column from a matrix), how
can I
pass the column name of the matrix into the title (or indeed to form
part
of the x-axis label)?
TIA,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: [EMAIL PROTECTED]
__
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
__
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
Re: [R] Passing colnames to graphics title
Laura Quinn wrote: Hi, Just a quick query - if I'm creating a function to produce a number of histograms per page of output (one per column from a matrix), how can I pass the column name of the matrix into the title (or indeed to form part of the x-axis label)? By extracting them using colnames()? Uwe Ligges TIA, Laura Laura Quinn Institute of Atmospheric Science School of Earth and Environment University of Leeds Leeds LS2 9JT tel: +44 113 343 1596 fax: +44 113 343 6716 mail: [EMAIL PROTECTED] __ 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 __ 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
