Scilab Function

param3d - 3D plot of a parametric curve

### Calling Sequence

  `param3d(x,y,z,[theta,alpha,leg,flag,ebox])`

### Parameters

- `x,y,z` : three vectors of the same size (points of the parametric curve).
- `theta,alpha` : real values giving in degree the spherical coordinates of the observation point.
- `leg` : string defining the captions for each axis with @ as a field separator, for example "X@Y@Z".
- `flag=[type,box]` : `type` and `box` have the same meaning as in `plot3d`:

- `type` : an integer (scaling).

- `type=0` the plot is made using the current 3D scaling (set by a previous call to `param3d`, `plot3d`, `contour` or `plot3d1`).
- `type=1` rescales automatically 3d boxes with extreme aspect ratios, the boundaries are specified by the value of the optional argument `ebox`.
- `type=2` rescales automatically 3d boxes with extreme aspect ratios, the boundaries are computed using the given data.
- `type=3` 3d isometric with box bounds given by optional `ebox`, similarily to `type=1`
- `type=4` 3d isometric bounds derived from the data, to similarily`type=2`
- `type=5` 3d expanded isometric bounds with box bounds given by optional `ebox`, similarily to `type=1`
- `type=6` 3d expanded isometric bounds derived from the data, similarily to `type=2`

- `box` : an integer (frame around the plot).

- `box=0` nothing is drawn around the plot.
- `box=1` unimplemented (like box=0).
- `box=2` only the axes behind the surface are drawn.
- `box=3` a box surrounding the surface is drawn and captions are added.
- `box=4` a box surrounding the surface is drawn, captions and axes are added.

- `ebox` : used when `type` in `flag` is 1. It specifies the boundaries of the plot as the vector `[xmin,xmax,ymin,ymax,zmin,zmax]`.

### Description

`param3d` is used to plot a 3D curve defined by its coordinates `x`, `y` and `z`.

Use `param3d1` to do multiple plots.

Enter the command `param3d()` to see a demo.

### Examples

    t=0:0.1:5*%pi;
    param3d(sin(t),cos(t),t/10,35,45,"X@Y@Z",[2,3])

### See Also

`param3d1` `plot3d`

### Author

J.Ph.C.