Hello, Jun,
try
split(df, f = factor(df$C, exclude = NULL))
For more info see ?factor, of course.
Regards -- Gerrit
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Dr. Gerrit Eichner Mathematical Institute, Room 212
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Am 24.05.2019 um 06:40 schrieb Jun Shen:
Dear list,
Say I have a data frame with NA in the variable which I want to use as a
sorting variable for splitting the data frame.
df <- data.frame(A=1:10, B=c(rep(99,5), rep(100,5)), C=c(rep(NA,3),
rep(1,3), rep(2,4)))
split(df, f=df[c('C')], drop=FALSE), I got the output as follows. I was
hoping to retain the part of the df where C=NA. drop=FALSE doesn't seem to
take effect here. Appreciate any comments. Thanks.
$`1`
A B C
4 4 99 1
5 5 99 1
6 6 100 1
$`2`
A B C
7 7 100 2
8 8 100 2
9 9 100 2
10 10 100 2
Jun
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