param3d

3D plot of a parametric curve

Calling Sequence

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

Arguments

: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. The default values are 35 and 45 degree.

: :leg string defining the labels 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 acoount. 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

param3d is used to plot a 3D curve defined by its 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).

Use param3d1 to do multiple plots.

Enter the command param3d() to see a demo.

Sample

Examples

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

e=`gce`_() //the handle on the 3D polyline

e.foreground=`color`_('red');

a=`gca`_(); //the handle on the axes
a.rotation_angles=[10 70];

See Also

• param3d1 3D plot of parametric curves
• plot3d 3D plot of a surface