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Contour Plots (Mlmode)
Syntax contour(z)
contour(z, v)
contour(x, y, z)
contour(x, y, z, v)
See Also contour , mlmode_mesh

Description
Contour plotting function in Mlmode .

contour(z)
Make a simple contour plot in the current viewport with row index corresponding to the y axis and column index corresponding to the x axis. (For a detailed description see contour(matrix) where matrix is equal to the transpose of z.)

contour(z, v)
If v is a scalar, it specifies the number of contour levels. In this cases the levels are evenly spaced between the minimum and maximum value in z. It v is not a scalar, it is an integer, real, or double-precision vector. It length specifies the number of contour levels and its elements specify the z value for the corresponding contour level. (For a detailed description see contour(matrix, levels) where matrix is equal to z' and levels is the value for each of the contour levels.)

contour(x, y, z)
Same as contour(z) except that the integer, real or double-precision vectors x and y specify the axis x and y axis values. To be specific, the row index value i corresponds to y(i) on the y axis, and the column index value j corresponds to x(j) on the x axis.

Number of Levels
When v specifies the number of contour levels, there are actually two extra colors required. The first extra color corresponds to the minimum value of z and the second corresponds to its maximum value.

Example
If in Mlmode you enter
     x = 1 : 8;
     y = 1 : 8;
     z = y' * x;
     num2str(z)
 O-Matrix will reply
     1   2   3   4   5   6   7   8
     2   4   6   8  10  12  14  16
     3   6   9  12  15  18  21  24
     4   8  12  16  20  24  28  32
     5  10  15  20  25  30  35  40
     6  12  18  24  30  36  42  48
     7  14  21  28  35  42  49  56
     8  16  24  32  40  48  56  64
 If you continue by entering
     omginit
     contour(z)
 O-Matrix will draw the following plot