What is the syntax for building a command-line pde given the model parameters exported from pdetool?

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Burke Rosen
Burke Rosen 2017-2-9
回答： Burke Rosen 2017-2-10
I have a working 2-d pdetool model, that I would like to convert to a command line model in order to iterate and export solutions. From pdetool I have exported the following variables:
%%%Draw
% gd : geometry data
% sf : set formula
% ns : labels
%%%Boundary
% g : geometry
% b : boundary
%%%PDE
% c : PDE coefficients
% a :
% f :
% d :
mesh
p : points e : edges t : triangle
I have recreated the geometry with :
pdem = createpde(1);
geometryFromEdges(pdem,g);
But I have been unable to get much further.
applyBoundaryCondition(pdem,'dirichlet','Edge',1:20,'b',b);
Error using pde.BoundaryCondition (line 93)
The value of 'BCType' is invalid. The first argument to pde.BoundaryCondition must be
'dirichlet','neumann', or 'mixed'.
specifyCoefficients(pdem,'m',0,'d',d,'c',c,'a',a,'f',f);
Error using pde.CoefficientAssignment/CoefPrecheck (line 412)
A coefficient value cannot be a character vector or character vector-expression.
And generateMesh does not seem to have any arguments that look like the pdetool outputs.
What is the syntax for building a command-line pde given the model parameters exported from pdetool?
Thank you.

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Burke Rosen
Burke Rosen 2017-2-10
I believe I have figured it out.
v = assempde(b,p,e,t,c,a,f);
This returns the solution for each point in the mesh. This can then be plotted:
scatter(p(1,:),p(2,:),ones(size(sol)),sol,'filled')
% or
[xq,yq] = meshgrid(-11:.1:-3, 0:.1:5);% insert appropriate values
vq = griddata(p(1,:),p(2,:),v,xq,yq);
mesh(xq,yq,vq)
view(0,90)
It would be very nice, however, if pdetool could export a complete PDEMmodel object.

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