Topic Modeling in R

Topic Modeling.  A kind of textual analysis we did long before R, using cluster based 'Content Analysis'.  An  examination and R code for how this can be done in the modern era. An example of unstructured text analytics.     Their definition:  " .... A statistical approach for discovering “abstracts/topics” from a collection of text documents based on statistics of each word. In simple terms, the process of looking into a large collection of documents, identifying clusters of words and grouping them together based on similarity and identifying patterns in the clusters appearing in multitude. .. "