[R] overlay two histograms ggplot

[Thierry Onkelinx]

Dear Elahe,

Something like

joint <- rbind(
  data.frame(x = gg$Az, veg = gg$veg, type = "Alz"),
  data.frame(x = tt$Cont, veg = gg$veg, type = "Cont")
)
ggplot(joint, aes(x = x, fill = veg, colour = type)) + geom_plot(alpha = 0.2)

Best regards,

ir. Thierry Onkelinx
Statisticus / Statistician

Vlaamse Overheid / Government of Flanders
INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE
AND FOREST
Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance
thierry.onkelinx op inbo.be
Kliniekstraat 25, B-1070 Brussel
www.inbo.be

///////////////////////////////////////////////////////////////////////////////////////////
To call in the statistician after the experiment is done may be no
more than asking him to perform a post-mortem examination: he may be
able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does
not ensure that a reasonable answer can be extracted from a given body
of data. ~ John Tukey
///////////////////////////////////////////////////////////////////////////////////////////


Van 14 tot en met 19 december 2017 verhuizen we uit onze vestiging in
Brussel naar het Herman Teirlinckgebouw op de site Thurn & Taxis.
Vanaf dan ben je welkom op het nieuwe adres: Havenlaan 88 bus 73, 1000 Brussel.

///////////////////////////////////////////////////////////////////////////////////////////



2017-12-13 13:14 GMT+01:00 Elahe chalabi via R-help <r-help op r-project.org>:
> Hi all,
>
> How can I overlay these two histograms?
>
> ggplot(gg, aes(gg$Alz, fill = gg$veg)) + geom_histogram(alpha = 0.2)
> ggplot(tt, aes(tt$Cont, fill = tt$veg)) + geom_histogram(alpha = 0.2)
>
> thanks for any help!
> Elahe
>
> ______________________________________________
> R-help op r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.