pdecont

(Removed) Contour plot of PDE node or triangle data

pdecont has been removed. Use pdeplot instead. For information on updating your code, see Version History.

Syntax

pdecont(p,t,u)

pdecont(p,t,u,n)

pdecont(p,t,u,v)

h = pdecont(___)

Description

pdecont(p,t,u) creates a contour plot of node data or triangle data. By default, pdecont uses 10 levels for a contour plot. The p and t arguments specify the geometry of the PDE problem.

If u is a column vector, pdecont treats it as a node data. If u is a row vector, pdesurf treats it as a triangle data.

pdecont(p,t,u,n) plots n levels.

pdecont(p,t,u,v) plots levels at the solution heights specified by v.

h = pdecont(___) uses any of the previous syntaxes and returns handles to the drawn axes objects.

Input Arguments

p — Mesh points

matrix

Mesh points, specified as a 2-by-Np matrix of points, where Np is the number of points in the mesh. For details on the mesh data representation, see initmesh.

Data Types: double

t — Mesh triangles

matrix

Mesh triangles, specified as a 4-by-Nt matrix of triangles, where Nt is the number of triangles in the mesh. For details on the mesh data representation, see initmesh.

Data Types: double

u — PDE solution

vector

PDE solution, specified as a vector.

The pdesurf function treats a column vector as node data and uses continuous style and interpolated shading. The function treats a row vector as triangle data and uses discontinuous style and flat shading.

Data Types: double

n — Number of levels

positive integer

Number of levels, specified as a positive integer.

Data Types: double

v — Levels to plot

vector of heights

Levels to plot, specified as a vector of heights.

Data Types: double

Output Arguments

h — Handles to graphics objects

vector

Handles to graphics objects, returned as a vector.

Tips

• For more control over a contour plot, use the pdeplot function.

Version History

Introduced before R2006a

R2024a: Errors

The pdecont function has been removed.

To update your code for plotting the default 10 levels u, change instances of the function call pdecont(p,t,u) to the function call:

pdeplot(p,[],t,'XYData',u,'XStyle','off', ...
               'Contour','on','ColorBar','off')

To update your code for plotting the first n levels, change instances of the function call pdecont(p,t,u,n) to the function call:

pdeplot(p,[],t,'XYData',u,'XStyle','off', ...
               'Contour','on','Levels',n, ...
               'ColorBar','off')

To update your code for plotting levels specified as a vector v, change instances of the function call pdecont(p,t,u,v) to the function call:

pdeplot(p,[],t,'XYData',u,'XStyle','off', ...
               'Contour','on','Levels',v, ...
               'ColorBar','off')

pdeplot gives you more control over your contour plot.

Note that the legacy workflow that uses the [p,e,t] mesh is not recommended. New features might not be compatible with this legacy workflow. For description of the mesh data in the recommended workflow, see Mesh Data.

R2023a: Warns

The pdecont function issues a warning that it will be removed in a future release. Use pdeplot instead.

R2022a: To be removed

The pdecont function runs without a warning, but will be removed in a future release. Use pdeplot instead.