Creating a banded matrix with spdiags in MATLAB

Huumah · Mar 3, 2013

Equation 2.34: a banded system matrix with rows 16 -9 8/3 -1/4; -4 6 -4 1; 1 -4 6 -4 1 down to the last rows 16/17 -60/17 72/17 -28/17; -12/17 96/17 -156/17 72/17, multiplying column vector y1 to yn, equal to h^4/EI times column vector f(x1) to f(xn).

I'm trying to make a banded matrix in MATLAB like the one in my picture.

I'm trying to use the spdiags function but I'm not going even close to getting the same matrix.

I have tried the help in Matlab but have had no luck yet.

How can you tell the bandwidth is 7?

DrClaude · Mar 11, 2013

Can you explain in more details what you have tried?

And the bandwith here is 5.

Creating a banded matrix with spdiags in MATLAB

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