XploRe Help : contour3

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Group:	Plot Manipulation
See also:	contour2

Function:		contour3
Description:		Computes lines and points for a contour plot of a four-dimensional dataset at level c.

Usage:	`{lt, pt} = contour3(x, c)`
Input:
	`x`	n x 4 matrix containing (sorted) data
	`c`	scalar, defining the level at which cutting takes place
Output:
	`lt`	m1 x 2 matrix representing the lines of the contour plot
	`pt`	m2 x 3 matrix representing the points of the contour plot

Note:

It is important that the data matrix x is sorted by its columns.

Example:

x = grid(-#(3,3,3), #(0.5,0.5,0.5), #(13,13,13)) f = exp(-0.5.*sum(x^2,2))./(2.*pi)^1.5 z = sort(x~f, #(1,2,3,4)) {lt,pt} = contour3(z, max(f)./2) d = createdisplay(1,1) show(d,1,1,pt)

Result:

A three-dimensional contour plot of f is shown.
It corresponds to a contour ball.