Hello All, I have had considerable bad luck with attempting the following with for loops. Here is the problem:
# Suppose we have a data.frame with the following data, which can be considered a type of edgelist (for those with networks backgrounds): # # V1 V2 # 1 A # 1 A # 1 B # 2 A # 3 C # 3 A # 3 C # 3 B # # I want the output of the function to produce a matrix, such that #each factor of V1 is a row, and each corresponding value at position k of V2 is the i,j^th element of the new matrix, with missing values otherwise. The desired output should be: # [,1] [,2] [,3] [,4] # [1,] A A B NA # [2,] A NA NA NA # [3,] C A C B I have explored the reshape package as well as the network package in this pursuit, with no luck. Thanks, Chris Marcum UCI Sociology ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.