[R] How to calculate the shared area of 2 plots?

[Viechtbauer Wolfgang (STAT)]

Something like this?

http://stats.stackexchange.com/questions/12209/percentage-of-overlapping-regions-of-two-normal-distributions

Best,
Wolfgang

--
Wolfgang Viechtbauer, Ph.D., Statistician | Department of Psychiatry and
Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD
Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
________________________________________
From: R-help [r-help-bounces at r-project.org] On Behalf Of Jackson Rodrigues [jacksonmrodrigues at gmail.com]
Sent: Saturday, October 31, 2015 5:18 PM
To: r-help at r-project.org
Subject: [R] How to calculate the shared area of 2 plots?

Dear all,

I have 2 data sets (A and B) with normal distributions. When I plot them
together, they overlay/share one part of plot.
I want to extract from each A and B that shared area.
Actually I want to sum A+B and then to compare the result with the
individual shared area of A and B to know how much (in %) each one
represents. (Am I clear?)

The folowing codes do not represent exactly my data, however the final
result (plot) is very similar to what I get in the end with my data.
I can provide my original data if necessary.

A<-seq(-4,4,.01)
B<-seq(-4,4,.01)

densities<-dnorm(A, 0,1)
densities2<-dnorm(B, 0,1)

plot(A,densities, type="l", col="red")
lines(B+2,densities2, type="l")

I am very grateful for any support, help, advise  and etc ... :)


best wishes

Jackson
--

Jackson M. Rodrigues
Department of Palynology and Climate Dynamics
Albrecht-von-Haller-Institute for Plant Sciences
Georg-August-University Göttingen
Untere Karspuele 2
37073 Göttingen/Germany
Tel.:   0049 (0) 176 8186 4994

*"In order to succeed, we must first believe that we can."*
*Nikos Kazantzakis*

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