marmap (version 1.0.10)

diag.bathy: Finds matrix diagonal for non-square matrices

Description

Finds either the values of the coordinates of the non-linear diagonal of non-square matrices.

Usage

diag.bathy(mat,coord=FALSE)

Value

A vector of diagonal values is coord is FALSE, or a table of diagonal coordinates ifcoord is FALSE

Arguments

mat

a data matrix

coord

whether of not to output the coordinates of the diagonal (default is FALSE)

Author

Eric Pante

Details

diag.bathy gets the values or coordinates from the first element of a matrix to its last elements. If the matrix is non-square, that is, its number of rows and columns differ, diag.bathy computes an approximate diagonal.

See Also

get.transect, diag

Examples

	
# a square matrix: diag.bathy behaves as diag
	matrix(1:25, 5, 5) -> a ; a
	diag(a)
	diag.bathy(a)

# a non-square matrix: diag.bathy does not behaves as diag
	matrix(1:15, 3, 5) -> b ; b
	diag(b)
	diag.bathy(b)
	
# output the diagonal or its coordinates: 
	rownames(b) <- seq(32,35, length.out=3)
	colnames(b) <- seq(-100,-95, length.out=5)
	diag.bathy(b, coord=FALSE)
	diag.bathy(b, coord=TRUE)