I could install 'RWeka' package successfully using the command:
install.packages('RWeka')
but when I tried to load in using the command: library(RWeka), it reads :Error: package or namespace load failed for ‘RWeka’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]):
there is no package called ‘RWekajars’