Contour plot under a 3-D shaded surface plot
h = surfc(...)
surfc(Z) creates a contour
plot under the three-dimensional shaded surface from the z components
[m,n] = size(Z). The height,
is a single-valued function defined over a geometrically rectangular
Z specifies the color data, as well as surface
height, so color is proportional to surface height.
surfc(Z,C) plots the height
Z, a single-valued function defined over a geometrically
rectangular grid, and uses matrix
C, assumed to
be the same size as
Z, to color the surface.
the color data and surface height.
vectors or matrices defining the
of a surface. If
In this case, the vertices of the surface faces are (X(j),
Y(i), Z(i,j)) triples. To create X and Y matrices for arbitrary
domains, use the
define color. MATLAB® performs a linear transformation on this
data to obtain colors from the current colormap.
specifies surface properties along with the data.
into the axes with handle
axes_handle instead of
the current axes (
h = surfc(...) returns
handles to a chart surface and a contour object.
Display a contour plot under a surface plot of the
[X,Y,Z] = peaks(30); figure surfc(X,Y,Z)
surfc does not accept complex inputs.
Consider a parametric surface parameterized by two independent
j, which vary
continuously over a rectangle; for example,
The three functions
z(i,j) specify the surface. When
integer values, they define a rectangular grid with integer grid points.
z(i,j) become three
Z. Surface color is a fourth function,
denoted by matrix
Each point in the rectangular grid can be thought of as connected to its four nearest neighbors.
i-1,j | i,j-1 - i,j - i,j+1 | i+1,j
This underlying rectangular grid induces four-sided patches
on the surface. To express this another way,
a list of triples specifying points in 3-D space. Each interior point
is connected to the four neighbors inherited from the matrix indexing.
Points on the edge of the surface have three neighbors. The four points
at the corners of the grid have only two neighbors. This defines a
mesh of quadrilaterals or a quad-mesh.
You can specify surface color in two different ways: at the
vertices or at the centers of each patch. In this general setting,
the surface need not be a single-valued function of
Moreover, the four-sided surface patches need not be planar. For example,
you can have surfaces defined in polar, cylindrical, and spherical
shading function sets the shading. If the shading is
C must be the same size as
Z; it specifies the
colors at the vertices. The color within a surface patch varies depending on the color at the
local coordinates. If the shading is
faceted (the default) or
C(i,j) specifies the constant color in the
(i,j) - (i,j+1) | C(i,j) | (i+1,j) - (i+1,j+1)
In this case,
C can be the same size as
Z and its last row and column are ignored.
Alternatively, its row and column dimensions can be one less than
surfc function specifies the viewpoint
The range of
the current setting of the axes
ZLimMode properties (also set by the
determines the axis labels.
The range of
C or the current setting of
(also set by the
caxis function) determines the
color scaling. The scaled color values are used as indices into the