Applying a function to margins of a dibble or array, including a matrix.
Usage
apply(X, MARGIN, FUN, ...)
# S3 method for default
apply(X, MARGIN, FUN, ..., simplify = TRUE)
# S3 method for tbl_ddf
apply(X, MARGIN, FUN, ...)
# S3 method for ddf_col
apply(X, MARGIN, FUN, ...)Arguments
- X
A dibble or array, including a matrix.
- MARGIN
An integer or character vector giving the subscripts which the function will be applied over.
- FUN
A function to be applied.
- ...
Optional arguments to FUN.
- simplify
A logical indicating whether results should be simplified if possible.
Value
A dibble if X is a dibble. See base::apply() for the return value
of the default method.
Details
apply() overrides base::apply() to make it generic. The default method
calls the base version.
Examples
x <- array(1:24, 2:4,
list(axis1 = letters[1:2],
axis2 = letters[1:3],
axis3 = letters[1:4]))
apply(x, 2:3, sum)
#> axis3
#> axis2 a b c d
#> a 3 15 27 39
#> b 7 19 31 43
#> c 11 23 35 47
apply(as_dibble(x), 2:3, sum)
#> # A dibble: 12
#> # Dimensions: axis2 [3], axis3 [4]
#> axis2 axis3 .
#> <chr> <chr> <int>
#> 1 a a 3
#> 2 a b 15
#> 3 a c 27
#> 4 a d 39
#> 5 b a 7
#> 6 b b 19
#> 7 b c 31
#> 8 b d 43
#> 9 c a 11
#> 10 c b 23
#> 11 c c 35
#> 12 c d 47
apply(x, c("axis2", "axis3"), sum)
#> axis3
#> axis2 a b c d
#> a 3 15 27 39
#> b 7 19 31 43
#> c 11 23 35 47
apply(as_dibble(x), c("axis2", "axis3"), sum)
#> # A dibble: 12
#> # Dimensions: axis2 [3], axis3 [4]
#> axis2 axis3 .
#> <chr> <chr> <int>
#> 1 a a 3
#> 2 a b 15
#> 3 a c 27
#> 4 a d 39
#> 5 b a 7
#> 6 b b 19
#> 7 b c 31
#> 8 b d 43
#> 9 c a 11
#> 10 c b 23
#> 11 c c 35
#> 12 c d 47