Unlist data frame column preserving information from other column

by

You may also use unnest from package tidyr:

library(tidyr)
unnest(myDataFrame, col2)

#      row  col1  col2
#    (dbl) (chr) (dbl)
# 1      1     A     1
# 2      1     A     4
# 3      1     A     6
# 4      1     A     7
# 5      2     B     2
# 6      2     B     7
# 7      2     B     3
# 8      3     C     5
# 9      3     C     5
# 10     3     C     3
# 11     3     C     9
# 12     3     C     6
# 13     4     D     7
# 14     4     D     9

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