Displaying 2 results from an estimated 2 matches for "maplevels".
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amplevel
2006 Nov 11
0
c() for factors
Dear R-core!
I have written a function mapLevels() to map levels of a factor. It can
produce a map (internally a list) of factor levels and internal integer
codes. I call this integer levelsMap. There is also character levelsMap,
but not of importance at this moment. I found out that it was quite
straightforward to write c() method for factors wi...
2017 Jul 06
3
Efficient swapping
Thanks a lot, Ista! I really appreciate it.
How about a slightly different case as the following:
set.seed(1)
(tmp <- data.frame(x = 1:10, R1 = sample(LETTERS[1:5], 10, replace =
TRUE), R2 = sample(LETTERS[2:6], 10, replace = TRUE)))
x R1 R2
1 C B
2 B B
3 C E
4 E C
5 E B
6 D E
7 E E
8 D F
9 C D
10 A E
Notice that the factor levels between