Spatial correlation between layers

Discussion created by mmyacob on Jun 25, 2013
Latest reply on Jun 27, 2013 by EKrause-esristaff
Really basic question...  We have multiple layers of point data (representing locations of different species).  We have identified one "key" species.

We've mapped the data, and made density layers and directional ellipses for each species.  We can visually see that some species are spatially correlated with the "key" species and some are not.

We want to be able to express simply and quantitatively (with pairwise correlation coefficients or similar) which other species tend to occur near to the "key" species and which species are not particularly spatially correlated with the "key" species.

This seems like a really rudimentary task in ArcGIS, but we can't figure out how to do it.  Any help is most appreciated!