On 11/30/2009 03:22 PM, Tim Clark wrote:
Dear List,I am trying to get a basic plot to show a continuous range of fill colors. It is probably easiest to demonstrate. I would like a legend like in the following example: Satellite.Palette<-colorRampPalette(c("blue3","cyan","aquamarine","yellow","orange","red")) require(fields) image.plot(volcano, col = Satellite.Palette (500), legend.lab="Scale") contour(volcano, levels = seq(90, 200, by = 5), add = TRUE) However, I am using the basic plot function. So far I have figured out how to remove any space between the colors using the y.intersp call in legend(). Now I need to somehow plot the legend so that it 1) fits on the plotting region, 2) has fewer labels, and 3) doesn't have black lines between each color. The example I am trying to get to work is: Sat.Pal<-Satellite.Palette (101) x<-rnorm(100, mean = 50, sd = 50) y<-rnorm(100, mean = 50, sd = 50) z<-seq(1,100, by=1) plot(x,y,pch=16,col=Sat.Pal[z]) legend("topleft", legend=seq(0,100, by=1), fill=Sat.Pal[seq(1,101, by=1)], bty="n", y.intersp=.5) I would appreciate any help or suggestions on how to get this to produce a legend with "continuous" colors.
Hi Tim, Have a look at the "color.legend" function in the plotrix package. Jim ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
