ZERO matrix function
ZERO(A) returns a matrix with the same dimensions as matrix A with all elements equal to zero.
ZERO(n) returns a square n × n matrix, consisting of all zeros.
ZERO(r,c) returns a r × c matrix, consisting of all zeros.
Matrix Algebra Useful for Statistics
Shayle R. Searle, Andre I. Khuri
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This book addresses matrix algebra that is useful in the statistical analysis of data as well as within statistics as a whole. The material is presented in an explanatory style rather than a formal theorem-proof format and is self-contained.