PointsAlong: Find spaced Points along a line

In GEOmap: Topographic and Geologic Mapping

Find spaced Points along a line

Description

find evenly spaced points along a line

Usage

PointsAlong(x, y, spacing = NULL, N = 1, endtol = 0.1)

Arguments

x	x-coordinates
y	y-coordinates
spacing	spacing of points
N	number of points
endtol	indent on either ends

Details

The total length is returned: this is the line integral along the trace.

Value

List:

x	x-coordinates
y	y-coordinates
rot	angle at the points
TOT	total length along the trace

Author(s)

Jonathan M. Lees<[e-mail]

Examples

plot(c(-5,5), c(-5,5), asp=1, type='n' )
ff=list()
ff$x=c(-4.850,-4.700,-3.934,-2.528, 0.603, 2.647, 3.861, 2.626)
ff$y=c(-4.045,-2.087,-0.710, 0.172, 1.291, 2.087,-0.753,-4.131)

g = PointsAlong(ff$x, ff$y, N=20)

lines(ff$x, ff$y)
points(g$x, g$y)

GEOmap documentation built on Sept. 1, 2023, 5:09 p.m.