Hi there,
As i was trying to aggregate the frequency of the terms for each variable, i used this code "words_freq = rollup(tdm, 2, na.rm=TRUE, FUN = sum)", where tdm is the term document matrix, it gave me this error message - Error in rollup(tdm, 2, na.rm = TRUE, FUN = sum) :
could not find function "rollup"
so is there any alternative solution to this error.
please help me out.