Psychology 7291: Multivariate Statistics (Carey) 8/27/98 Matrix Algebra - 1 Introduction to Matrix Algebra Definitions: A matrix is a collection of numbers ordered by rows and columns. It is

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Matrices Adding. The two matrices must be the same size, i.e. the rows must match in size, and the columns must match in size. Negative. Subtracting. Multiply by a Constant. We call the

Algebra of Matrices Definition. ( Equality of Matrices ). Two m \times n m × n matrices A=\left [a_ {i j}\right] A = [aij] and B=\left [b_y\right] B = [by] are equal if and only if

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A rectangular array of numbers is called a matrix (the plural is matrices ), and the numbers are called the entries of the matrix. Matrices are usually denoted by uppercase letters: , , , and so

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