knotR (version 1.0-2)

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

knotplot(k5_1)

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