R help - Feb 2008 - plot each column of a matrix or dataframe versus x in a single plot

How do a plot several columns of a matrix at once in a single plot
versus a single x-variable?

The default plot.matrix  or plot.dataframe commands plot each column
versus each other column in several sub-plots. I want to plot each
column versus a single other vector (x) as several lines or points in
one plot.

I can do it by hand: get the range of all variables (i.e. columns of
the matrix or dataframe), initiate an empty plot command, loop through
all the columns and issue a lines or points command.
I guess there is a predefined sophisticated function for that,
however, I was not able to find it.

Does someone know where I find such a function?

Best regards
tomaschwutz

you could use the function matplot(), e.g.,

x <- 1:20
vals <- 2 + rep(1:5, each = 20) * rep(x, 5) + rnorm(100)
dim(vals) <- c(20, 5)

matplot(x, vals, type = "l", lty = 1)


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/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "tomaschwutz" <thomas.wutzler at web.de>
To: <r-help at r-project.org>
Sent: Thursday, February 14, 2008 3:55 PM
Subject: [R] plot each column of a matrix or dataframe versus x in a 
singleplot

> How do a plot several columns of a matrix at once in a single plot
> versus a single x-variable?
>
> The default plot.matrix  or plot.dataframe commands plot each column
> versus each other column in several sub-plots. I want to plot each
> column versus a single other vector (x) as several lines or points 
> in
> one plot.
>
> I can do it by hand: get the range of all variables (i.e. columns of
> the matrix or dataframe), initiate an empty plot command, loop 
> through
> all the columns and issue a lines or points command.
> I guess there is a predefined sophisticated function for that,
> however, I was not able to find it.
>
> Does someone know where I find such a function?
>
> Best regards
> tomaschwutz
>
> ______________________________________________
> R-help at r-project.org 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.
> 

Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Hi Thomas,

Ckeck ?matplot. Here's a simple example:

# Data set
x=runif(100)                    # Axis
x1=rnorm(100,25,2)         # Variable x_i
x2=rnorm(100,10,1)
 x3=rnorm(100,15,4)
 x4=rnorm(100,30,4)
DATA=cbind(x,x1,x2,x3,x4)

# Plot
matplot(x,DATA[,2:5],col=1:5,pch=1:5)


I hope this helps.


Jorge




On 2/14/08, tomaschwutz <thomas.wutzler@web.de>
wrote:
>
> How do a plot several columns of a matrix at once in a single plot
> versus a single x-variable?
>
> The default plot.matrix  or plot.dataframe commands plot each column
> versus each other column in several sub-plots. I want to plot each
> column versus a single other vector (x) as several lines or points in
> one plot.
>
> I can do it by hand: get the range of all variables (i.e. columns of
> the matrix or dataframe), initiate an empty plot command, loop through
> all the columns and issue a lines or points command.
> I guess there is a predefined sophisticated function for that,
> however, I was not able to find it.
>
> Does someone know where I find such a function?
>
> Best regards
> tomaschwutz
>
> ______________________________________________
> R-help@r-project.org 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.
>
	[[alternative HTML version deleted]]

Thank you Dimitris, Jorge, and Mark (personal mail),

for the hint to matplot and the examples.
This was exactly what I was thinking of.

Thomas

Perhaps matplot will do what you want?
?matplot
aa <- matrix(1:25, nrow=5)
matplot(aa)

--- tomaschwutz <thomas.wutzler at web.de> wrote:
> How do a plot several columns of a matrix at once in
> a single plot
> versus a single x-variable?
> 
> The default plot.matrix  or plot.dataframe commands
> plot each column
> versus each other column in several sub-plots. I
> want to plot each
> column versus a single other vector (x) as several
> lines or points in
> one plot.
> 
> I can do it by hand: get the range of all variables
> (i.e. columns of
> the matrix or dataframe), initiate an empty plot
> command, loop through
> all the columns and issue a lines or points command.
> I guess there is a predefined sophisticated function
> for that,
> however, I was not able to find it.
> 
> Does someone know where I find such a function?
> 
> Best regards
> tomaschwutz
> 
> ______________________________________________
> R-help at r-project.org 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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