contourslice

📝Syntax

contourslice(V, xs, ys, zs)
contourslice(V, XI, YI, ZI)
contourslice(X, Y, Z, V, xs, ys, zs)
contourslice(X, Y, Z, V, XI, YI, ZI)
contourslice(..., levels)
contourslice(..., method)
contourslice(parent, ...)
h = contourslice(...)

📄Description

contourslice computes contour lines on selected volume slices and returns a column vector of patch objects.

The levels input can be a scalar number of contour levels or a vector of contour values. A slice value equal to NaN selects all slices along that direction.

When XI, YI, and ZI are matrices, contours are drawn along the surface defined by those matrices.

The optional method input can be 'nearest', 'linear', or 'cubic'. The default method for axis-aligned slices is 'nearest'; the default for surface slices is 'linear'.

💡Examples

Display contours in several slice planes.

[X, Y, Z] = meshgrid(-2:.2:2);
V = X .* exp(-X.^2 - Y.^2 - Z.^2);
xslice = [-1.2, 0.8, 2];
yslice = [];
zslice = [];
contourslice(X, Y, Z, V, xslice, yslice, zslice);
view(3);
grid on;

Specify contour levels and add a colorbar.

[X, Y, Z] = meshgrid(-2:.2:2);
V = X .* exp(-X.^2 - Y.^2 - Z.^2);
xslice = [-1.2, 0.8, 2];
levels = -0.2:0.01:0.4;
contourslice(X, Y, Z, V, xslice, [], [], levels);
colorbar;
view(3);
grid on;

Display contours on a surface slice.

[X, Y, Z] = meshgrid(-5:0.2:5);
V = X .* exp(-X.^2 - Y.^2 - Z.^2);
[xsurf, ysurf] = meshgrid(-2:0.2:2);
zsurf = xsurf.^2 - ysurf.^2;
contourslice(X, Y, Z, V, xsurf, ysurf, zsurf, 20);
view(3);
grid on;