Thank you. That helps me understand the issue better. I came up with a similar solution . . . but yours is more elegant (I just wrote out the labels . . ).
My solution follows: stackpoly(CaribMatrix, stack=TRUE, xlab="Year",ylab="Catch in tons", col.main="red", font.main=4, axis4="FALSE", xat=seq(50,760,by=100), xaxlab=c(1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000)) -----Original Message----- From: Jim Lemon [mailto:j...@bitwrit.com.au] Sent: Fri 12/23/2011 2:53 AM To: Ben Neal Cc: r-help@r-project.org Subject: Re: [R] Axis manipulation in Stackpoly (Plotrix) On 12/23/2011 07:52 AM, Ben Neal wrote: > > Have made a stacked area plot, but now want to manipulate the x axis: make in > even increments (50) in order to suppress the tick marks (forming solid bar > under plot). However, the plot functions do not seem to work, and I cannot > find documentation for use of xat in stackpoly. > > This is a time series of data covering 579 years, and has been successfully > converted from zoo to matrix. Data plotting fine, jsut want to change axis - > > CaribMatrix<-as.matrix(ts4Ex) > stackpoly(CaribMatrix, stack=TRUE, xlab="Year",ylab="Catch in tons", > xaxlab=(1250:2008), > main="Historical Florida reef fisheries catch by sector", > axis4="FALSE") > > Any assistance appreciated! Thanks very much, Benjamin P Neal, Scripps Inst. > of Oceanogrpahy > Hi Ben, In the stackpoly function, you can specify the positions of the axis ticks (xat=...) and the labels for those positions (xaxlab=...). You don't seem to have supplied the "x" values, so the values in CaribMatrix will be placed display at 1:dim(CaribMatrix)[1]. I'll have to make up CaribMatrix... CaribMatrix<-matrix(order(sample(200:500,579,TRUE),nrow=579,ncol=3) stackpoly(CaribMatrix,stack=TRUE,ylim=c(0,1500),xat=seq(1,600,by=50), xaxlab=seq(1450,2000,by=50),staxx=TRUE) This seems to give a reasonable plot for me. Jim ______________________________________________ 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.