plot() and Jpeg() increase font size and resolution
On Fri, 24 Nov 2006 Alexander.Herr at csiro.au wrote:
Dear list,
I am having troubles increasing the fontize when plotting a
variogram{gstat} and its model (vgm) with plot and using jpeg(). Also
the resolution in the jpeg call does not work. I am using R2.4 on
Mandriva 10.2 linux.
I can change fontsize with cex.axis in a normal plot, so I presume it
has to do with plotting the variogram model. Any help on how to increase
the font size and resolution would be appreciated?
I believe that the underlying plot.gstatVariogram() method uses lattice graphics, not base graphics. So the problem is to find the right way of passing the parameter for xyplot(), and then see if plot.gstatVariogram() lets you do the same. df <- data.frame(x=1:10, y=runif(10)) xyplot(y ~ x, df, scales=list(cex=3)) works, but data(meuse) vgm1 <- variogram(log(zinc)~1, ~x+y, meuse) plot(vgm1, scales=list(cex=3)) unfortunately doesn't, so more exploration will be needed. I think the scales= argument is not passed through in the final brach to xyplot() in gstat:::plot.gstatVariogram(). From the examples: plot(v, group.id = FALSE, auto.key = TRUE, scales=list(cex=2)) works, but plot(vgm2, scales=list(cex=2)) doesn't. Roger
R-calls: v1<-variogram(log(z)~x+y, loc=coordinates(shp1),data=shp1) m1<-vgm(0.0175, "Gau", 200000,0.052) jpeg(file="LOTPLAN_variogram_mod.jpg", bg="white", res=300, pointsize=16, width=1200, height=1200, quality=100) plot(v1,plot.number=F, model=m1, ylim=c(0.04,0.08), col="black", cex.axis=1.5) dev.off() Thanks Herry Dr Alexander Herr Spatial and statistical analyst CSIRO, Sustainable Ecosystems Davies Laboratory, University Drive, Douglas, QLD 4814 Private Mail Bag, Aitkenvale, QLD 4814 Phone/www (07) 4753 8510; 4753 8650(fax) Home: http://herry.ausbats.org.au Webadmin ABS: http://ausbats.org.au Sustainable Ecosystems: http://www.cse.csiro.au/
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Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no