[R] Installing gym package error

[Gary]

Dear R help

Don't really understand if there is graph or should be graph.



> library(ggm)
Loading required package: graph
Error: package ‘graph’ could not be loaded
In addition: Warning messages:
1: package ‘ggm’ was built under R version 2.15.3 
2: In library(pkg, character.only = TRUE, logical.return = TRUE, lib.loc = lib.loc) :
  there is no package called ‘graph’


G