CBIND matrix function
CBIND(A,B[,..]) returns a matrix with matrix B appended to matrix A, columnswise. Matrix A and B must have the same number of rows.
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.