C = contourc(Z)C = contourc(Z,n)C = contourc(Z,v)C = contourc(x,y,Z)C = contourc(x,y,Z,n)C = contourc(x,y,Z,v)
contourc calculates the contour matrix C used by the M-file contour to draw actual contour plots.
C = contourc(Z) computes the contour matrix for a contour plot of matrix Z. The contours are level lines in the units of Z. The number of contour lines and their corresponding values are chosen automatically by contourc.
C = contourc(Z,n) computes contours of matrix Z with n contour levels.
C = contourc(Z,v) computes contours of Z with contour levels at the values specified in vector v.
C = contourc(x,y,Z), C = contourc(x,y,Z,n), and C = contourc(x,y,Z,v) compute contours of Z and use the data in vectors x and y to control the axis scaling on the x- and y-axes. The elements of x and y are equally spaced.
The contour matrix C is a two-row matrix of contour lines. Each contiguous drawing segment contains the value of the contour, the number of (x,y) drawing pairs, and the pairs themselves. The segments are appended end-to-end,
C = [level1 x1 x2 x3...level2 x2 x2 x3...;
pairs1 y1 y2 y3...pairs2 y2 y2 y3...]
contourc assumes that vectors x and y are monotonically increasing. If x and y are irregularly spaced, the contours are simply stretched apart, which is not the same as contouring the irregularly spaced data.
contour,contour3
(c) Copyright 1994 by The MathWorks, Inc.