r - Error in UseMethod("filter_") : no applicable method for 'filter_' applied to an object of class "c('double', 'numeric')"

Question

Was trying to filter numeric value >100 to create a new vector , but am getting the error. tried upload dplyr package & removing as.numeric with no luck . any help much appreciated.

c1<-c(1000,200) class(c1) [1] "numeric" outies<-c1%>%filter(c1>as.numeric(100)) Error in UseMethod("filter_") : no applicable method for 'filter_' applied to an object of class "c('double', 'numeric')"

Answer 1

As pointed out by @stefan, the filter() function in dplyr is used for filtering data frames and not vectors. @stefan's suggestion is to put your vector in a data frame (as one column) and then use the filter() function on it.

In case you absolutely need to keep your data in a vector and you would also like to use the tidyverse style of coding (i.e. with the pipe operator %>%), you could use the keep function inside the purrr package.

library(purrr)

c1 <- c(1000, 200)
 
keep(c1,  ~ .x > 100) # both values in the vector are greater than 100
[1] 1000  200

After all this, my personal opinion is that base R is more appropriate for filtering vectors:

c1[c1 > 100]
[1] 1000  200