Remove Constant Columns
Arguments
- x
An R object (should be a
matrix
or adata.frame
).- ...
Currently not used.
- na.rm
A
logical
scalar: shouldNA
values be stripped before the computation proceeds?
Examples
## Create a data.frame
X <- data.frame(A = 1, B = 1:3)
X
#> A B
#> 1 1 1
#> 2 1 2
#> 3 1 3
remove_constant(X)
#> B
#> 1 1
#> 2 2
#> 3 3
## Add NA
X[1, 1] <- NA
remove_constant(X)
#> A B
#> 1 NA 1
#> 2 1 2
#> 3 1 3
remove_constant(X, na.rm = TRUE)
#> B
#> 1 1
#> 2 2
#> 3 3