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Aide Scilab >> Graphiques > 3d_plot > param3d1

param3d1

3D plot of parametric curves

Calling Sequence

```param3d1(x,y,z,[theta,alpha,leg,flag,ebox])
param3d1(x,y,list(z,colors),[theta,alpha,leg,flag,ebox])```

Arguments

x,y,z

matrices of the same size (nl,nc).

Each column i of the matrices corresponds to the coordinates of the ith curve. You can give a specific color for each curve by using `list(z,colors)` instead of `z`, where `colors` is a vector of size `nc`. If `color(i)` is negative the curve is plotted using the mark with id `abs(style(i))`; if `style(i)` is strictly positive, a plain line with color id `style(i)` or a dashed line with dash id `style(i)` is used.

theta,alpha

real values giving in degree the spherical coordinates of the observation point. The default values are 35 and 45 degree.

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. This is the default value.

type=3

3d isometric with box bounds given by optional `ebox`, similarily to `type=1`.

type=4

3d isometric bounds derived from the data, similarily`to 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`.Note that axes boundaries can be customized through the axes entity properties (see axes_properties).

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.Note that axes aspect can also be customized through the axes entity properties (see axes_properties). This is the default value.

ebox

It specifies the boundaries of the plot as the vector `[xmin,xmax,ymin,ymax,zmin,zmax]`. This argument is used together with `type` in `flag` : if it is set to `1`, `3` or `5` (see above to see the corresponding behaviour). If `flag` is missing, `ebox` is not taken into acount. Note that, when specified, the `ebox` argument acts on the `data_bounds` field that can also be reset through the axes entity properties (see axes_properties). The `ebox` default value is `[0,1,0,1,0,1]`.

Description

`param3d1` is used to plot 3D curves defined by their coordinates `x`, `y` and `z`. Note that data can also be got or modified through the surface entity properties (see surface_properties).

Note that properties like `rotation angles`, `colors` and `thickness` of the plotted curves can also be got or modified through the polyline entity properties (see polyline_properties).

Enter the command `param3d1()` to see a demo.

Examples

```xset('window',20) // create a window number 20
t=[0:0.1:5*%pi]';
param3d1([sin(t),sin(2*t)],[cos(t),cos(2*t)],..
list([t/10,sin(t)],[3,2]),35,45,"X@Y@Z",[2,3])

xdel(20);
a=get("current_axes");//get the handle of the newly created axes
t=[0:0.1:5*%pi]';
param3d1([sin(t),sin(2*t)],[cos(t),cos(2*t)],[t/10,sin(t)])
a.rotation_angles=[65,75];
a.data_bounds=[-1,-1,-1;1,1,2]; //boundaries given by data_bounds
a.thickness = 2;
h=a.children //get the handle of the param3d entity: an Compound composed of 2 curves
h.children(1).foreground = 3 // first curve
curve2 = h.children(2);
curve2.foreground = 6;
curve2.mark_style = 2;```

• param3d — 3D plot of a parametric curve
• plot3d — 3D plot of a surface
• plot2d — 2D plot
• gca — Return handle of current axes.
• xdel — supprime des fenêtres graphiques
• delete — delete a graphic entity and its children.