comet3d

3D comet animated plot.

Calling Sequence

comet3d(z)

comet3d(x,y,z)

comet3d(x,y,fun)

comet3d(x,y,z,p)

comet3d(x,y,fun,p)

comet3d(...,"colors",c)

Parameters

:x a real vector or matrix. If omitted, it is assumed to be the vector

1:nz where nz is the number of curve points given by the z parameter.

: :y a real vector or matrix. If omitted, it is assumed to be the

vector 1:nz where nz is the number of curve points given by the z parameter.

: :z a real vector of length nz or a matrix with nz rows. : :p a real scalar in the interval [0 1[. Default value is 0.1. : :fun a scilab function with calling sequence z=fun(x,y). : :c a vector of ny color index. :

Description

If (x,y,z) are three vectors with the same number of elements, this function draws a 3D comet animated plot. The plot is made of three parts: :ahead mark that shows the current (x(i),y(i),z(i)) position. : :abody that shows the trailing curve that follows the head: the

(x(i-k:i),y(i-k:i),z(i-k:i))) part of the curve.

: :atail that shows the (x(1:i-k),y(1:i-k),z(1:i-k)) part of the

curve.

:

if z is a matrix and (x,y) are vectors then animated curves are drawn for each triple (x,y,z(:,l)). in this case nz is the number of rows of z.

if x,y,z are matrices with the same dimensions then animated curves are drawn for each triple (x(:,l),y(:,l),z(:,l)).

comet3d(x,y,fun,...) computes the z vector as z(i)=fun(x(i),y(i))

comet3d(...,p) can be used to set the relative length of the body. k is defined as k = round(p*nz).

Examples

t = `linspace`_(-%pi,%pi,500);
`clf`_();comet3d(`sin`_(5*t),`sin`_(t),t^2)

t = `linspace`_(-%pi,%pi,500)';
`clf`_();comet3d(`sin`_(5*t),`sin`_(t),[t^2,`ones`_(t)])

t = `linspace`_(-%pi,%pi,500)';
function z=traj(x, y),z=1.5*`sin`_(x^2)*`cos`_(y),endfunction
`clf`_();comet3d(`cos`_(t),`sin`_(t),traj)

See Also

• `comet`_

History

Version Description 5.3.2 Function comet3d introduced. .. _comet: comet.html