DrawArc

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Draw Elliptic or Circular Arc(s)

Draw one or more elliptic or circular arcs from angle.beg to angle.end on an existing plot using classic graphics.

Keywords
aplot
Usage
DrawArc(x = 0, y = x, rx = 1, ry = rx, theta.1 = 0, theta.2 = 2*pi, nv = 100, col = par("col"), lty = par("lty"), lwd = par("lwd"), plot = TRUE)
Arguments
x, y
a vector (or scalar) of xy-coordinates of the center(s) of the arc(s).

rx
a scalar or a vector giving the semi-major axis of the ellipse for the arc(s)

ry
a scalar or a vector giving the semi-minor axis of the ellipse for the arc(s). Default is radius.x which will result in a circle arc with radius.x.

theta.1
a scalar or a vector of starting angles in radians.

theta.2
a scalar or a vector of ending angles in radians.

nv
number of vertices used to plot the arc. Scalar or vector.

col
color for the arc(s). Scalar or vector.

lty
line type used for drawing.

lwd
line width used for drawing.

plot
logical. If TRUE the structure will be plotted. If FALSE only the xy-points are calculated and returned. Use this if you want to combine several geometric structures to a single polygon.
Details

All parameters are recycled if necessary. Be sure to use an aspect ratio of 1 as shown in the example to avoid distortion.

Value

invisibly returns a list of the calculated coordinates for all shapes.

See Also

DrawCircle, polygon

Aliases
  • DrawArc
Examples
curve(sin(x), 0, pi, col="blue", asp=1)
DrawArc(x = pi/2, y = 0, rx = 1, theta.1 = pi/4, theta.2 = 3*pi/4, col="red")
Documentation reproduced from package DescTools, version 0.99.19, License: GPL (>= 2)

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