Toolbox Problems: some functions missing

2017 3 15
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更新时间：2017 3 16
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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

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per isakson
per isakson 2017-3-15
编辑：per isakson 2017-3-15

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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)

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Douglas Bock
Douglas Bock 2017-3-15
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
Steven Lord 2017-3-15
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
Douglas Bock 2017-3-15
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
per isakson 2017-3-15
编辑：per isakson 2017-3-15
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
Steven Lord 2017-3-15
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
Douglas Bock 2017-3-16
Wonderful! Thanks to both Steven and Per!

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