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

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