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- comet

Please note that the recommended version of Scilab is 6.1.0. This page might be outdated.

See the recommended documentation of this function

# comet

2D comet animated plot.

### Calling Sequence

comet(y)

comet(x,y)

comet(x,fun)

comet(x,y,p)

comet(x,fun,p)

comet(...,"colors",c)

### Parameters

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

`1: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`

to
`size(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 of
`x`

and `y`

.

`comet(...,"colors",c)`

can be used to set the colors of each curves.

### Examples

### See Also

### Authors

- Serge Steer

### History

- First version April 2011, for Scilab-5.3.2

## Comments

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