Use facet_grid option to plot column of dataframe with ggplot2

Question

I get some result from simulation, and i want to make a facetting like this diagram below, and i don't know if it's possible to make this with ggplot2 and the facet_grid option.

My result for simulations have this "simplified" form, one line by simulation :

dat <- read.table(textConnection("P1 P2 P3 P4 R 
1 2e-5 1.0 0.6 3 1
2 4e-6 1.5 0.7 1.5 2
3 6e-7 1.2 0.6 2.5 3 
4 8e-8 1.45  0.65 3.2 4
"))

And here you can see the simplified graphic i want to produce with ggplot2 and facet_grid

graphic image ggplot2

I have one facet/graph by parameter, with different scale corresponding to min/max values for each of my parameter... You can also see on this graphic the color correspondance to localize each simulation in parameter space.

Thanks a lot for help

SR.

Aside from the small typo ("06" rather than "0.6") I don't think your data matches your intended graph. Is there an extra column or a missing column header? As it is, it looks like the data that goes with P1 is actually in the ID column. — joran
– joran, Commented Jun 1, 2012 at 14:36
Thanks, i correct the mistake. Graphics and data are for example, so data don't really represent the simplified figure :) — reyman64
– reyman64, Commented Jun 1, 2012 at 14:41

Justin · Accepted Answer · 2012-06-01 15:52:19Z

5

Here is a start:

library(plyr)
library(ggplot2)
dat.melt <- melt(data, id.vars='R')

ggplot(dat.melt, aes(x=0, y=value)) +
    geom_boxplot() +
    geom_point(aes(colour=factor(R))) +
    facet_wrap(~variable, ncol=1, scales='free') +
    coord_flip()

Plenty of other tweaks, but the gist is there. Usually a good first step is to melt the data long and then start fiddling. As a side note, its a good idea to avoid using data for a variable name since its a built in function.

answered Jun 1, 2012 at 15:52

Justin

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1 Comment

reyman64 Over a year ago

Thanks, i have some problem to fix xscale with ggplot2 and facet option, so i post a new question on stackoverflow stackoverflow.com/questions/10869540/…

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