apply: Apply Functions Over Matrix Margins (Rows or Columns)

In gmp: Multiple Precision Arithmetic

Apply Functions Over Matrix Margins (Rows or Columns)

Description

These are S3 methods for apply() which we re-export as S3 generic function. They “overload” the apply() function for big rationals ("bigq") and big integers ("bigz").

Usage

## S3 method for class 'bigz'
apply(X, MARGIN, FUN, ...)
## S3 method for class 'bigq'
apply(X, MARGIN, FUN, ...)

Arguments

X	a matrix of class bigz or bigq, see e.g., matrix.bigz.
MARGIN	1: apply function to rows; 2: apply function to columns
FUN	function to be applied
...	(optional) extra arguments for FUN(), as e.g., in lapply.

Value

The bigz and bigq methods return a vector of class "bigz" or "bigq", respectively.

Author(s)

Antoine Lucas

See Also

apply; lapply is used by our apply() method.

Examples

 x <- as.bigz(matrix(1:12,3))
 apply(x,1,min)
 apply(x,2,max)

 x <- as.bigq(x ^ 3, d = (x + 3)^2)
 apply(x,1, min)
 apply(x,2, sum)
 ## now use the "..." to pass  na.rm=TRUE :
 x[2,3] <- NA
 apply(x,1, sum)
 apply(x,1, sum, na.rm = TRUE)

gmp documentation built on July 9, 2023, 7 p.m.