Partial Differential Equation Toolbox

pdecont

Shorthand command for contour plot

Syntax

• pdecont(p,t,u) 
  pdecont(p,t,u,n) 
  pdecont(p,t,u,v) 
  h=pdecont(p,t,u) 
  h=pdecont(p,t,u,n) 
  h=pdecont(p,t,u,v)
  

Description

pdecont(p,t,u) draws 10 level curves of the PDE node or triangle data u. h=pdecont(p,t,u) additionally returns handles to the drawn axes objects.

If u is a column vector, node data is assumed. If u is a row vector, triangle data is assumed. Triangle data is converted to node data using the function pdeprtni.

The geometry of the PDE problem is given by the mesh data p and t. For details on the mesh data representation, see initmesh.

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

pdecont(p,t,u,v) plots using the levels specified by v.

This command is just shorthand for the call

• pdeplot(p,[],t,'xydata',u,'xystyle','off','contour','on',...
          'levels',n,'colorbar','off'); 
  

If you want to have more control over your contour plot, use pdeplot instead of pdecont.

Examples

Plot the contours of the solution to the equation over the geometry defined by the L-shaped membrane. Use Dirichlet boundary conditions u = 0 on .

• [p,e,t]=initmesh('lshapeg'); 
  [p,e,t]=refinemesh('lshapeg',p,e,t); 
  u=assempde('lshapeb',p,e,t,1,0,1); 
  pdecont(p,t,u)
  

See Also

pdeplot, pdemesh, pdesurf

pdecirc

pdeeig