knotplot: Plotting of knots

Description

Routines to plot projections of knots with a wide range of user-settable options

Usage

knotplot(x, ou, gap=20, n=100, lwd=8, setup=TRUE, ...)
knotplot2(x, rainbow=FALSE, seg=FALSE, text=FALSE, cross=FALSE, ink=FALSE,
                node=FALSE, width=TRUE, all=FALSE, n=100, circ=1000,
                lwd=8, setup=TRUE,...)

Arguments

x: Description of a knot, coerced to a controlpoints object and a minobj object
rainbow,seg,text,cross,ink,node,all,width,circ: Variables controlling sundry knotplot() features; see details
ou,gap: Variables controlling sundry knotplot2() features; see details
n: Number of points on each Bezier curve
lwd: Width of line to use
setup: Boolean, with default TRUE meaning to set up a new plot, and FALSE meaning to just add points and lines to an existing plot
...: Further arguments, passed to plot() and points()

Author

Robin K. S. Hankin

Details

Function knotplot() is useful for production-quality plotting of knots with crossings indicated; knotplot2() is more useful for development.

For knotplot2():

rainbow; use rainbow colouring for the segments
seg; plot the Bezier nodes and handles. The positions of the nodes and handles are obtained from an object of class controlpoints.
text; include the segment number on the segment
cross; label the crossings
ink; label the nodes with their inkscape numbering
width; show the bending strain energy

For knotplot():

overunderobj; A two-column matrix indicating the sense of the crossing. Each row corresponds to a crossing; the first entry is the segment number of the overstrand, and the second is the understrand
gap; the width of the gap
arclength Gap width measured by arc length or Euclidean distance

Examples

Run this code


knotplot(k5_1)

knotplot2(k6_1,text=TRUE,seg=TRUE,lwd=1)

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