filter function in dplyr errors
It does seem like you are getting the stats::filter
function and not the dplyr
one. To make sure you get the right one, use the notation dplyr::filter
.
d = data.frame(x=1:10,
name=c("foo","bar","baz","bar","bar","baz","fnord","qar","qux","quux"))
filter(d, !grepl("ar|ux", name))
Error in grepl("ar|ux", name) : object 'name' not found
dplyr::filter(d, !grepl("ar|ux", name))
x name
1 1 foo
2 3 baz
3 6 baz
4 7 fnord
You don't even need to do library(dplyr)
for this to work - you do need dplyr
installed though.
This works for functions from any package.
To understand why this happens you can recreate the error quite straightforwardly by following these steps.
Load dplyr
Load dplyr
into a new session with only default libraries loaded, filter
will work as dplyr
loaded after stats
library(dplyr)
#>
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#>
#> filter, lag
#> The following objects are masked from 'package:base':
#>
#> intersect, setdiff, setequal, union
filter(mtcars, mpg < 15)
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> 1 14.3 8 360 245 3.21 3.570 15.84 0 0 3 4
#> 2 10.4 8 472 205 2.93 5.250 17.98 0 0 3 4
#> 3 10.4 8 460 215 3.00 5.424 17.82 0 0 3 4
#> 4 14.7 8 440 230 3.23 5.345 17.42 0 0 3 4
#> 5 13.3 8 350 245 3.73 3.840 15.41 0 0 3 4
Unload dplyr
This causes the error as now trying to use stats::filter
. By unloading stats
we see another error that there is no function called filter
found at all
detach("package:dplyr") # Unload dplyr
filter(mtcars, mpg < 15) # Using stats::filter
#> Error in filter(., mpg < 15): object 'mpg' not found
detach("package:stats") # Unload stats
filter(mtcars, mpg < 15)
#> Error in filter(., mpg < 15): could not find function "filter"
Reload stats and dplyr
Make sure to reload dplyr
after stats
and we see that the dplyr
version of filter
works again
library(stats)
library(dplyr)
#>
#> Attaching package: 'dplyr'
#>
#> The following objects are masked from 'package:base':
#>
#> intersect, setdiff, setequal, union
filter(mtcars, mpg < 15)
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> 1 14.3 8 360 245 3.21 3.570 15.84 0 0 3 4
#> 2 10.4 8 472 205 2.93 5.250 17.98 0 0 3 4
#> 3 10.4 8 460 215 3.00 5.424 17.82 0 0 3 4
#> 4 14.7 8 440 230 3.23 5.345 17.42 0 0 3 4
#> 5 13.3 8 350 245 3.73 3.840 15.41 0 0 3 4
I reinstalled rlang package with restart session and it helped