comet - 2D comet animated plot. (original) (raw)

Scilab 5.3.3

Please note that the recommended version of Scilab is 2026.0.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Graphics > 2d_plot > comet

Calling Sequence

Parameters

x

a real vector or matrix. If omitted, it is assumed to be the vector1:ny where ny is the number of curve points (see below).

y

a real vector or matrix of length.

p

a real scalar in the interval[0 1[. Default value is 0.1.

fun

a scilab function with calling sequence y=fun(x). fun can also be a polynomial or a rational fraction.

c

a vector of ny color index.

Description

If (x,y) are two vectors with the same number of elements, this function draws a 2D comet animated plot showing the progession of the curve(x(1:k),y(1:k)) for k varying from 1 tosize(x,'*').

The plot is made of three parts:

a head mark that shows the current (x(i),y(i)) position.

a body that shows the trailing curve that follows the head: the(x(i-k:i),y(i-k:i)) part of the curve.

a tail that shows the (x(1:i-k),y(1:i-k)) part of the curve.

comet(x,fun,...) is equivalent to comet(x,feval(x,fun),...)

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

if y is a matrix then animated curves are drawn for each pair (x,y(:,l)). in this case ny is the number of rows of y.

if x and y are matrices with identical sizes then animated curves are drawn for each pair (x(:,l),y(:,l)). in this case ny is the number of rows ofxand y.

comet(...,"colors",c) can be used to set the colors of each curves.

Examples

function y=traj(x),y=1.5*sin(x^2),endfunction clf();comet(linspace(0,5,500),traj)

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