How to transform an R data frame with multiple classes into one class?

Question

When I call the dput() function on my df data frame I am presented with multiple classes.

df %>% dput()
#> ...
#> class = c("tbl_df", "tbl", "data.frame")
#> ...

How do I transform this data frame into a single class? I would get something like this I imagine:

df %>% dput()
#> ...
#> class = "data.frame"
#> ...

I'm having a separate issue and I suspect this (multiple classes in a date frame) may be a contributing factor.

@developer when I str(df) I get tibble [5,856 x 10] (S3: tbl_df/tbl/data.frame) followed by the column types which include "chr', "Date", and "logi". — Display name
– Display name, Commented Apr 28, 2020 at 14:14

linog · Accepted Answer · 2020-04-28 14:08:38Z

2

You can override the class like that:

class(df) <- "data.frame"

If you want to change the class in a pipe, from there, use df %>% "class<-"("foo")

Example:

data.table::data.table(x = rnorm(10)) %>% "class<-"("foo")
$`x`
 [1] -1.7728669 -0.3643645  0.4410907  0.3494225 -0.3214129  0.8595643  0.8794649  0.3891513
 [9] -2.2456579 -0.6045959

attr(,"row.names")
 [1]  1  2  3  4  5  6  7  8  9 10
attr(,"class")
[1] "foo"

edited Apr 28, 2020 at 14:08

answered Apr 28, 2020 at 13:50

linog

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1 Comment

Display name Over a year ago

can you also add the way to write that into a pipe? is it something like df %>% class("data.frame") which doesn't quite seem to work.

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