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Get the details of an almost block-diagonal matrix
Syntax
[nb,rows,ncols,last,blocks] = bkbrk(blokmat) bkbrk(blokmat)
Description
bkbrk is a utility used in slvblk. It returns the details of the almost block diagonal matrix contained in blokmat, with rows and last nb-vectors, and blocks a matrix of size [sum(rows),ncols].
If there are no output arguments, nothing is returned but the details are printed out. This is of use when trying to understand what went wrong with such a matrix.
spcol provides the spline collocation matrix in such a special spline almost block-diagonal form, for use with slvblk. But bkbrk can also decode the almost block-diagonal form used in [1].
See Also
slvblk, spcol
References
[1] C. de Boor and R. Weiss, "SOLVEBLOK: A package for solving almost block diagonal linear systems", ACM Trans. Mathem. Software 6 (1980), 80 - 87.