3

I have model plotted in R

base<- raster("example.tif") plot(base)

image I'd like to change value (0,5,10,15,20,25)

breakpoints<-c("0,5,10,15,20,25") plot(base,break=breakpoints)

Error in .rasterImagePlot(object, col = col, xlab = xlab, ylab = ylab, : object 'breakpoints' not found

I'd like make ramp(default colour)

  • Question: Please look at the colour legend in the attached image. This image was plotted in ferret program, which has different breaks, like 0-3 with 0.5 interval, 3-9 with 3 interval, 9-10 with 1 interval, 10-20 with 2 interval and 20-70 with 50 interval. The legend scale was uniformly graduated but labelled as per breaks given. Can we get such legends in R 'Raster - plot'? or any other packages in R? Thanks :) Karnan C ![Satellite chlorophyll](i.stack.imgur.com/uCXYN.png) – Karnan May 16 at 7:36
4

Using my base raster:

base<- raster("test.tif")
plot(base)

I got:

enter image description here

For your breakpoints:

breakpoints<-c(0,5,10,15,20,25)
plot(base, col=terrain.colors(6), breaks=breakpoints)

enter image description here

With help(plot), raster option, you can see examples of other descriptions for this R command.

Another plot option:

plot(base, col=colorRampPalette(c("red", "orange", "blue"))(6), breaks=breakpoints)

where I have:

enter image description here

Editing Note:

I know that the values of my raster are between 0-50. I can do this:

breakpoints<-c(0,5,10,15,20,25,50)
plot(base, col=colorRampPalette(c("red", "orange", "blue"))(7), breaks=breakpoints)

or this:

breakpoints<-c(0,5,10,15,20,25,50)
colors<-c("red", "orange", "blue","green","yellow","cyan","magenta")
plot(base, col=colors, breaks=breakpoints)

enter image description here

  • For customized colors: "A color palette, i.e. a vector of n contiguous colors generated by functions like rainbow, heat.colors, topo.colors, bpy.colors or one or your own making, perhaps using colorRampPalette’. If none is provided, ‘rev(terrain.colors(255))’ is used unless ‘x’ has a 'color table'" – xunilk Mar 29 '15 at 12:42
  • Please, edit your question and put the complete code that you are using. – xunilk Mar 29 '15 at 13:49
  • You have an error here: breakpoints<-c("0,5,10,15,20,25"). It is: breakpoints<-c(0,5,10,15,20,25) – xunilk Mar 29 '15 at 14:09
  • Because your original values are between 0-60 and now, you have new labels values produced by your breakpoints. Can you change the aspect of the legend? – xunilk Mar 29 '15 at 14:27
  • can >25 same color with 25 ? and how to change min color value to max color value? like this – Yax Mar 29 '15 at 14:45

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