Troubel mapping facet panel colors to a variable

[Raphael Mazor]

I am trying to map the color of a panel to a factor ("condition") in a
dataframe ("df"), but I don't think I'm going it right. The facets are
actually mapped to a different variable ("site").

facet_wrap( ~site ) + opts(panel.background = theme_rect( aes( df, fill
= condtion )))

When I do this, the backgrounds are all blank, and I get one warning for
each level of y:

In grid.Call.graphics(L_rect, x$x, x$y, x$width, x$height, ... :
supplied color is not numeric nor character

Any advice would be greatly appreciated!

--
Raphael D. Mazor
Freshwater Biologist
Southern California Coastal Water Research Project
3535 Harbor Blv Suite 110
Costa Mesa, CA 92626

Tel. (714) 755-3235
Fax. (714) 755-3299

[Joran]

Maybe you are looking for something like this:

dat <- data.frame(x = runif(16),

          y = runif(16),

  grp = rep(letters[1:4],each = 4))

 

ggplot(dat,aes(x = x,y = y)) +

facet_wrap(~grp) + 

geom_rect(aes(fill = grp),xmin = -Inf,xmax = Inf,ymin = -Inf,ymax = Inf,alpha = 0.2) + 

geom_point()

[Raphael Mazor]

Thanks, I was able to get what I wanted (that is, to use a different variable for panel color than the one I used for facetting) by modifying your script!

dat <- data.frame(x = runif(16),
          y = runif(16),

  grp = rep(letters[1:4],each = 4),
  grp.type = rep(c("E","F"),each = 8))

ggplot(dat,aes(x = x,y = y)) +
facet_wrap(~grp) +

geom_rect(aes(fill = grp.type),xmin = -Inf,xmax = Inf,ymin = -Inf,ymax = Inf,alpha = 0.2) +
geom_point()

Thanks!!!

Raphael D. Mazor
Freshwater Biologist
Southern California Coastal Water Research Project
3535 Harbor Blv Suite 110
Costa Mesa, CA 92626

Tel. (714) 755-3235
Fax. (714) 755-3299

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