Problem 1812. Tridiagonal
Return an n-by-n matrix that has a, b, c as the subdiagonal, main diagonal, and superdiagonal entries in the matrix.
Example
a=1 b=2 c=3 n=5 T = [2 3 0 0 0; 1 2 3 0 0; 0 1 2 3 0; 0 0 1 2 3; 0 0 0 1 2]
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2 older comments
J.R.! Menzinger
on 14 Aug 2013
did you mean n=4 and not d=4?? ;-)
Nicolae Preda
on 14 Aug 2013
it seems that the test code is broken n!=d
Ned Gulley
on 15 Aug 2013
I fixed the test suite so that n is used instead of d.
goc3
on 15 Mar 2017
Additional test cases have been added.
Robert Ritter
on 13 Dec 2021
great!
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