Hi,
I'm trying to create a simple function that takes a dataframe as its only
argument. I've been using gmodels::CrossTable, but it requires a lot of
arguments, e.g.:
#this runs fine
CrossTable(data$col1, data$col2, prop.chisq = FALSE, prop.c = FALSE, prop.t =
FALSE, format = "SPSS")
Moreover, I wanted to make it compatible with piping, so I decided to create
the following function:
ctab <- function(data) {
CrossTable(data[,1], data[,2], prop.chisq = FALSE, prop.c = FALSE, prop.t =
FALSE, format = "SPSS")
}
When I try to use this function, however, I get the following error:
#this results in 'Error: Must use a vector in `[`, not an object of class
matrix.'
data %>% select(col1, col2) %>% ctab()
I tried searching online but couldn't find much about that error (except for in
specific and unrelated cases). Moreover, when I created a very simple dataset,
it turns out there's no problem:
#this runs fine
data.frame(C1 = c('x','y','x','y'), C2 = c('a','a','b','b')) %>% ctab()
Is this a problem with my function or the data? If it's the data, why does
directly calling CrossTable work?
Thanks!
Best,
Zach
[[alternative HTML version deleted]]
______________________________________________
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.
