How to solve a 2D PDE with backward Euler?

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Danny Helwegen
Danny Helwegen 2019-1-13
编辑： M 2019-1-14
Hi, i have to solve the 2D heat equation:
∂T/∂t = α∇^2 T = α(∂^2T/∂x^2 + ∂^2T/∂y^2)
It is given that at the 4 boundaries the T is 0. I've already written some code, but it doesn't works. Can someone review my code and help me? The error occurs at the end, when the new T are put in a matrix. The code has been added as an attachment.

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M
M 2019-1-14
编辑：M 2019-1-14
At line 58, you are trying to access the 11th element of the Number matrix, but its dimensions are 10 x 10, so you get an error.

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