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])

Parameters

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))+1; 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. Use xset() to see the mark and color ids.

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

param3d1 is used to plot 3D curves defined by their coordinates x, y and z.

Enter the command param3d1() to see a demo.

Examples



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])

Author

J.Ph.C.