[R] plot a vertical column of colored rectangles
baptiste.auguie at googlemail.com
Sun Jul 17 00:00:54 CEST 2011
You could try grid.colorstrip() from the gridExtra package,
grid.colorstrip(ifelse(dat, "blue", "red"))
or grid.raster(), which should be more efficient,
grid.raster(matrix(ifelse(dat, "blue", "red")), interp=FALSE,
On 15 July 2011 22:20, Nacho Caballero <nachocab at gmail.com> wrote:
> Hi, I've been really struggling with this.
> If I have a vector like
> dat <- c(0,0,0,0,1,1,1,0,0,0,1,1,0,0,0,1,0,0,0)
> I want to plot each element as a colored rectangle (red=1, blue=1) in the
> right order, so they all stack up forming a vertical column on the graph.
> Sort of like a building, with each floor in the appropriate color.
> Any ideas?
> I've tried using ggplot and geom_tile, but my data has a million elements
> and the plots take forever to generate.
> I've also tried using a heatmap, but I need 2 columns at least, and I only
> have 1.
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