Restore original data from document term matrix in R

Asked Mar 01 '22 at 20:09

Active Mar 01 '22 at 20:09

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I want to know if there is a way to go back to my original database (df) after I have made it a document term matrix.

Here is an example of what I want to do.

df <- data.frame(group=c("A","A","B","B","C"),
                 comment = c("hello world","hello friend","one world","one friend","hello friend"))

my_cor <- tm::Corpus(VectorSource(df$comment))
my_tdm <- tm::DocumentTermMatrix(my_cor, control = list(minWordLength = 1))
final_matrix <- as.matrix(my_tdm)

I want to transform "final_matrix" to "df".

I hope someone can help me, thank you very much.

asked Mar 01 '22 at 20:09

Sergio Parra

1

I don't think that what you want is possible. `final_matrix` does not preserve word order. – Mikael Jagan Mar 02 '22 at 05:37
Yep, a document term matrix does not have any information on word order. – Julia Silge Mar 11 '22 at 01:03

Restore original data from document term matrix in R

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