Toolbox Problems: some functions missing

See picture for details.

I'm running Matlab 2015b with pde toolbox, yet some functions from that release (eg. interpolateSolution) are missing. Functions that were introduced earlier in this toolbox work fine. Any ideas what I can do to use these new functions?

Cheers

Doug

Answer 1

[per isakson]

interpolateSolution &nbsp is obviously a method of three different classes

&nbsp

thus the first argument of the call must be an instance of one of those classes.

And those classes are in the package, pde.

&nbsp

Added later

>> version
ans =
9.0.0.341360 (R2016a)

[Douglas Bock]

Thanks for your answer, Per. Now

    help pde.PDEResults.interpolateSolution

gives me the info, however when I try and test it with some data I get the error:

The class pde.PDEResults has no Constant property or Static method named 'interpolateSolution'.

Why could this be?

[Steven Lord]

You need to call interpolationSolution with a results object (from the solvepde function, as shown in the examples on the documentation page for interpolationSolution) of one of those three classes as the first input.

myResults = solvepde(pdemodel);
interpolationSolution(myResults, ...)

[Douglas Bock]

I do not have solvepde as that was introduced in 2016. I am using pdenonlin instead, which doesn't return an object but a vector.

So in order to use interpolateSolution (available from 2015) I need to pass it an object which is created by solvepde (available from 2016)??? That doesn't seem right!

[per isakson]

Yes, solvepde was introduced in R2016a. The R2016a documentation says

&nbsp

Thus, you have to use one of the old solvers. I found this in the R2015b release notes

&nbsp

Hope this answers the question. Obviously, R2015b is in the middle of a transition and the documentation could have been better.

[Steven Lord]

Sorry, I didn't consider the fact that the function may have changed between the release you were using and the current release whose documentation I was reading.

Looking at the examples on the documentation page for interpolateSolution in release R2015b you will need to create a results object using createPDEResults and pass that object into interpolateSolution. Using the example from the documentation for pdenonlin:

% Create and set up the model
model = createpde;
geometryFromEdges(model,@circleg);
a = 0;
f = 0;
c = '1./sqrt(1+ux.^2+uy.^2)';
boundaryfun = @(region,state)region.x.^2;
applyBoundaryCondition(model,'Edge',...
  1:model.Geometry.NumEdges,...
  'u',boundaryfun,'Vectorized','on');
generateMesh(model,'Hmax',0.1);

% Solve the PDE
u = pdenonlin(model,c,a,f);

% Create the results object
results = createPDEResults(model, u)

% Interpolate the solution
IS = interpolateSolution(results, ...
  -0.5:0.125:0.5, ...
  -0.5:0.125:0.5)

[Douglas Bock]

Wonderful! Thanks to both Steven and Per!