A Note on the vec Operator Applied to Unbalanced Block-Structured Matrices

Hal Caswell and Silke F. van Daalen

Journal of Applied Mathematics, 2016, vol. 2016, 1-3

Abstract:

The vec operator transforms a matrix to a column vector by stacking each column on top of the next. It is useful to write the vec of a block-structured matrix in terms of the vec operator applied to each of its component blocks. We derive a simple formula for doing so, which applies regardless of whether the blocks are of the same or of different sizes.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnljam:4590817

DOI: 10.1155/2016/4590817

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