[R-sig-Geo] How many polygons does a single polygon intersect with?

[Vijay Ramesh]

I currently possess a shapefile that consists of >5000 polygons. I would
like to know, for each polygon, how many other polygons it intersects with
and the names of each polygon it intersects with?

My output should be something like this:

[image: enter image description here] <https://i.stack.imgur.com/ELv3T.png>

Based on Jeffrey Evans suggestion on using gIntersects, I have tried the
following below. But, the process has been running continuously without
stopping for the last 5 hours. Any suggestions?

Here's the code I ran in R:

require(rgdal)
library(maptools)
library(rgeos)
library(GISTools)
Poly <- readOGR("C:\\Users\\rameshv\\Terrestrial_dissolved_multipart.shp")
Poly_join <- gIntersects(Poly)

Regards,
Vijay
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