search for: classic9

...E, CE, WCE, S, WS, CS, WCS, ES, WES, CES & WCES. Ideally I would like to represent everything in one graph and as concise as possible. Drawing 4 circles and depicting it as overlap just gives me 13 out of the 15 possibilities needed (as e.g. depicted here http://www.psy.ritsumei.ac.jp/~akitaoka/classic9e.html in the graph "Four circles surrounding illusion"). Does anybody has a nice solution, ideally with a possible solution in R? Thanks in advance! Johannes -- Project Coordinator BIOTA West Amphibians Museum of Natural History Dep. of Research (Herpetology) Invalidenstrasse 43 D-101...