How do I write $sin(pix)sin(pi*y)?

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kaps 2021-3-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/786281-how-do-i-write-sin-pi-x-sin-pi-y

编辑： kaps 2021-3-29

在 MATLAB Online 中打开

I tried to solve

and

on the boundary.

I get error when I write

. Can anyone help in the following code?

model = createpde;
g = geometryFromEdges(model,@squareg);
pdegplot(model)
pdegplot(model,'EdgeLabels','on'); 
axis equal
applyBoundaryCondition(model,'dirichlet','Edge',1:model.Geometry.NumEdges,'u',0);
specifyCoefficients(model,'m',0,'d',0,'c',1,'a',0,'f',sin(pi*x)*sin(pi*x)); 