Note: This page has been translated by MathWorks. Please click here

To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

3-D contour plot

`contour3(Z)`

contour3(Z,n)

contour3(Z,v)

contour3(X,Y,Z)

contour3(X,Y,Z,n)

contour3(X,Y,Z,v)

contour3(...,LineSpec)

contour3(...,Name,Value)

contour3(ax,...)

[C,h] = contour3(...)

`contour3`

creates a 3-D contour plot of a
surface defined on a rectangular grid.

`contour3(Z)`

draws a contour
plot of matrix `Z`

in a 3-D view. `Z`

is
interpreted as heights with respect to the *x*-*y* plane. `Z`

must
be at least a 2-by-2 matrix that contains at least two different values.
The *x* values correspond to the column indices
of `Z`

and the *y* values correspond
to the row indices of `Z`

. The contour levels are
chosen automatically.

`contour3(Z,n)`

draws a contour
plot of matrix `Z`

with `n`

contour
levels in a 3-D view.

`contour3(Z,v)`

draws a contour
plot of matrix `Z`

with contour lines at the values
specified in vector `v`

. The number of contour levels
is equal to `length(v)`

. Specifying the vector `v`

sets
the `LevelListMode`

property to manual. To display
a single contour line at a particular value, define `v`

as
a two-element vector with both elements equal to the desired contour
level. For example, to draw a single contour of level `k`

,
use `contour3(Z,[k k])`

.

`contour3(X,Y,Z)`

, `contour3(X,Y,Z,n)`

,
and `contour3(X,Y,Z,v)`

draw contour plots of `Z`

using `X`

and `Y`

to
determine the *x* and *y* values.

If

`X`

and`Y`

are vectors, then`length(X)`

must equal`size(Z,2)`

and`length(Y)`

must equal`size(Z,1)`

. The vectors must be strictly increasing or strictly decreasing and cannot contain any repeated values.If

`X`

and`Y`

are matrices, then their sizes must equal the size of`Z`

. Typically, you should set`X`

and`Y`

so that the columns are strictly increasing or strictly decreasing and the rows are uniform (or the rows are strictly increasing or strictly decreasing and the columns are uniform).

If `X`

or `Y`

is
irregularly spaced, then `contour3`

calculates
contours using a regularly spaced contour grid, and then transforms
the data to `X`

or `Y`

.

`contour3(...,LineSpec)`

draws
the contour lines using the line type and color specified by `LineSpec`

. `contour3`

ignores
marker symbols.

`contour3(...,Name,Value)`

specifies
contour properties using one or more property name, property value
pairs. `Name`

is the property name and must appear
inside single quotes (`''`

). `Value`

is
the corresponding value. For example, `'LineWidth',2`

sets
the contour line width to 2. For a list of contour property names
and values, see Contour Properties.

`contour3(ax,...)`

plots
into the axes specified by `ax`

instead of into the
current axes (`gca`

).

`[C,h] = contour3(...)`

returns
the contour matrix `C`

containing the data that defines
the contour lines and the `Contour`

object `h`

.
The `clabel`

function uses the
contour matrix to label the contour lines.

Was this topic helpful?