Change colour scale in stat_contour()

[Kevin Stierhoff - NOAA Federal]

I'm having difficulty changing the color scale to anything but the default 'blues' for contour plots with geom = "polygon". I've tried scale_fill_gradient(), etc. with no success. I'm sure it's simple, but I'm stuck. Code and example plot below. Data attached.

Thanks,
Kevin

load(interp_out.Rdata)

v <- ggplot(interp.out, aes(x, y, z = z))

v + stat_contour(geom="polygon", aes(fill=..level..),binwidth=2) + stat_contour(binwidth=2) + facet_wrap(~freq) + 

  scale_x_continuous('\nAthwartship Beam Angle (deg)') + scale_y_continuous('Alongship Beam Angle (deg)\n') +

  theme_bw()

[Brandon Hurr]

Kevin, 

I'm not sure what your issue is, but scale_fill_gradient() works very well for me. 

See:

http://docs.ggplot2.org/0.9.3.1/scale_gradient.html

http://docs.ggplot2.org/0.9.3.1/scale_gradient2.html

http://docs.ggplot2.org/0.9.3.1/scale_gradientn.html

ggplot(interp.out, aes(x, y, z = z)) + 

stat_contour(geom="polygon", aes(fill=..level..),binwidth=2) + stat_contour(binwidth=2) + facet_wrap(~freq) + 

scale_x_continuous('\nAthwartship Beam Angle (deg)') + scale_y_continuous('Alongship Beam Angle (deg)\n') +

theme_bw()+

scale_fill_gradient(low="red", high="darkblue")

Thanks for the reproducible example! Very helpful.

B

[Kevin Stierhoff - NOAA Federal]

Hi Brandon,

Now I'm not sure what my problem was! Perhaps I had the scale_colour_gradient() too close to the stat_contour()? Works just fine with what you suggested, tacking it on at the end. Nonetheless, thanks for helping me sort that out. 

Kevin

--

Kevin Stierhoff
Research Fisheries Biologist
NOAA Fisheries-SWFSC

8901 La Jolla Shores Dr.

La Jolla, CA 92037 
Kevin.S...@noaa.gov
(858) 546-7180
www.nmfs.noaa.gov
http://swfsc.noaa.gov/