Displaying 1 result from an estimated 1 matches for "tp3255405p3255405".
2011 Feb 02
2
Indexing from two variables
Hello, thank you all for your patience and time
I am essentially trying to get disorganised data into long form for linear modelling.
I have 2 dataframes "rec" and "book"
Each row in "book" needs to be pasted onto the end of several of the rows of "rec" according to two variables in the row:" MRN" and "COURSE" which match.
I have