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 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.
    • 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 .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 ).
• 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 ).

Description

param3d is used to plot a 3D curve defined by its coordinates x , y and z . Note that data can also be set or get through the surface entity properties (see surface_properties ).

Note that properties like rotation angles , colors and thickness of the plotted curves can also be set through the param3d entity properties (see param3d_properties ).

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.