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

In marmap: Import, Plot and Analyze Bathymetric and Topographic Data

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)

Arguments

mat	a data matrix
coord	whether of not to output the coordinates of the diagonal (default is FALSE)

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.

Value

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

Author(s)

Eric Pante

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)
	

marmap documentation built on March 31, 2023, 6:59 p.m.