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 at inbo.be
Kliniekstraat 25, B-1070 Brussel
www.inbo.be
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2017-12-13 13:14 GMT+01:00 Elahe chalabi via R-help <r-help at
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
>
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