'Error in par(args) : parameter "mar" has the wrong length'
Any suggestions?
Code below includes fake labels for testing.
Cheers,
Sander.
# some fake data please, maestro
fakedata<-sample(1:10,10)
# leave a bit of extra space beneath and to the left of the plot
par(mar=6,6,4,2)
# this function will probably end up in the "plotrix" package
time.line<-function(x,y,at=NULL,labels=TRUE,tlticks=NULL,...) {
if(missing(x) && missing (y))
stop("Usage: time.line(x,y,at=NULL,labels=TRUE)")
plotrange<-par("usr")
# get the graphical parameters
oldpar<-par(no.readonly=TRUE)
# turn off clipping
par(xpd=TRUE)
if(missing(x)) {
# it's a horizontal line
segments(plotrange[1],y,plotrange[2],y,...)
ticklen<-(plotrange[4]-plotrange[3])*0.02
if(!is.null(tlticks))
segments(tlticks,y+ticklen,tlticks,y-ticklen,...)
mwidth<-strwidth("M")
# blank out the line where labels will appear
rect(at-mwidth,y-ticklen,at+mwidth,y+ticklen,col="white",border=FALSE)
# rotate the text
par(srt=270)
# draw the labels
text(at,y,labels,...)
}
if(missing(y)) {
# it's a vertical line
# draw the line
segments(x,plotrange[3],x,plotrange[4],...)
ticklen<-(plotrange[2]-plotrange[1])*0.02
if(!is.null(tlticks))
segments(x+ticklen,tlticks,x-ticklen,tlticks,...)
mheight<-strheight("M")
# blank out the line where labels will appear
rect(x-ticklen,at-mheight,x+ticklen,at+mheight,col="white",border=FALSE)
# draw the labels
text(x,at,labels,...)
}
# restore the parameters
par(oldpar)
}
# some fake labels
eventT<-c(2.5, 4, 7, 8.5)
eventD<-c("first event","second event","third event","fourth event")
tl.labels<-data.frame(eventT,eventD)
plot(fakedata,xlab="")
# display a horizontal time line
time.line(x=-1,at=tl.labels[[1]],labels=tl.labels[[2]],col="black")
# now a vertical one
time.line(y=-1,at=tl.labels[[1]],labels=tl.labels[[2]],col="black")
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 0.1
year 2004
month 11
day 15
language R
>
Jim Lemon wrote:
Sander Oom wrote:
Dear R users,
In order to illustrate the possible effects of events on variables
plotted against time, I would like plot a time line of events along side
the plot of the variables.
The x-axis should be some time unit; the y-axis should be the variable
of interest; the time line should be plotted below the graph along the
same x-axis scale.
As I have many variables and different events lists, I would like to
write a script to read the events from a file and plot them together
with the other plot.
The time line should look something like this:
http://www.oslis.k12.or.us/secondary/howto/organize/images/timeline.gif
Here's one way:
# some fake data please, maestro
fakedata<-sample(1:10,10)
# leave a bit of extra space beneath and to the left of the plot
par(mar=6,6,4,2)
# this function will probably end up in the "plotrix" package
time.line<-function(x,y,at=NULL,labels=TRUE,tlticks=NULL,...) {
if(missing(x) && missing (y))
stop("Usage: time.line(x,y,at=NULL,labels=TRUE)")
plotrange<-par("usr")
# get the graphical parameters
oldpar<-par(no.readonly=TRUE)
# turn off clipping
par(xpd=TRUE)
if(missing(x)) {
# it's a horizontal line
segments(plotrange[1],y,plotrange[2],y,...)
ticklen<-(plotrange[4]-plotrange[3])*0.02
if(!is.null(tlticks))
segments(tlticks,y+ticklen,tlticks,y-ticklen,...)
mwidth<-strwidth("M")
# blank out the line where labels will appear
rect(at-mwidth,y-ticklen,at+mwidth,y+ticklen,col="white",border=FALSE)
# rotate the text
par(srt=90)
# draw the labels
text(at,y,labels,...)
}
if(missing(y)) {
# it's a vertical line
# draw the line
segments(x,plotrange[3],x,plotrange[4],...)
ticklen<-(plotrange[2]-plotrange[1])*0.02
if(!is.null(tlticks))
segments(x+ticklen,tlticks,x-ticklen,tlticks,...)
mheight<-strheight("M")
# blank out the line where labels will appear
rect(x-ticklen,at-mheight,x+ticklen,at+mheight,col="white",border=FALSE)
# draw the labels
text(x,at,labels,...)
}
# restore the parameters
par(oldpar)
}
# create a file with the positions and labels you want like this:
# 2.5,first
# 4,second
# 7,third
# 8.5,fourth
# call it "labels.txt" and read it in
tl.labels<-read.table("labels.txt",sep=",")
plot(fakedata,xlab="")
# display a horizontal time line
time.line(x=-1,at=tl.labels[[1]],labels=tl.labels[[2]],col="black")
# now a vertical one
time.line(y=-1,at=tl.labels[[1]],labels=tl.labels[[2]],col="black")
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______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
