salad (version 1.2)

Summary: Summary methods for objects of class dual

Description

Methods extending to dual objects the corresponding methods for numeric objects.

Usage

# S3 method for dual
sum(x, ..., na.rm = FALSE)
# S4 method for numericOrArray
sum(x, ..., na.rm = FALSE)
# S3 method for dual
prod(x, ..., na.rm = FALSE)
# S4 method for numericOrArray
prod(x, ..., na.rm = FALSE)
# S3 method for dual
max(x, ..., na.rm = TRUE)
# S4 method for numericOrArray
max(x, ..., na.rm = TRUE)
# S3 method for dual
min(x, ..., na.rm = TRUE)
# S4 method for numericOrArray
min(x, ..., na.rm = TRUE)
# S3 method for dual
range(x, ..., na.rm = TRUE)
# S4 method for numericOrArray
range(x, ..., na.rm = TRUE)
# S4 method for dual
which.min(x)
# S4 method for dual
which.max(x)

Value

`which.min` and `which.max` return an integer, the other methods return a dual object.

Arguments

x

a dual object

...

extra arguments

na.rm

if 'TRUE', NA values are removed

Details

For `max` and `min`, the derivative is equal to the derivative of maximum element as identified by `which.max` and `which.min`. This is unfortunately problematic in presence of ties. If this is an issue, you may redefine this function (at the expense of speed).

Examples

x <- dual( c(1,2,4) )
sum(x)
d(sum(x), "x1")