Hello,
When you unlist, the dimension is dropped since the result is just one
vector. Add drop = FALSE and that's it.
unlist(df[, "VarY", drop = FALSE])
Hope this helps,
Rui Barradas
Às 19:05 de 06/05/2022, Hooiveld, Guido escreveu:
Dear all,
I wrote a some code in which I 'convert' a data frame to a named vector using
the function unlist(). This works very nicely for my use case, because each
entry of the resulting vector is named after the column name of the data frame,
with a number automatically appended. I am using these names for the subsequent
part of my code.
However, I noticed that when I subset the data frame so it contains only a
single column, the naming of the vector (as described above) doesn't occur
anymore (i.e. names() = NULL). This breaks my downstream code. Any suggestion
on how to still obtain a named vector from such single-column data frame?
Thanks,
Guido
df <- data.frame("VarX" = c("A",2,"D",2,1) ,
+ "VarY" = c(5,7,9,8,7) )
unlist(df) #nice!
VarX1 VarX2 VarX3 VarX4 VarX5 VarY1 VarY2 VarY3 VarY4 VarY5
"A" "2" "D" "2" "1" "5" "7" "9" "8" "7"
names(unlist(df))
[1] "VarX1" "VarX2" "VarX3" "VarX4" "VarX5" "VarY1" "VarY2" "VarY3" "VarY4"
[10] "VarY5"
unlist(df[, "VarY"]) #where are the names now? Expected them to be "VarY1" ...
"VarY5"
[1] 5 7 9 8 7
names(unlist(df[, "VarY"]))
NULL
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
