# 4-4 - 4-4 Matrices Basic OperationsA matrixis a rectangular...

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Unformatted text preview: 4-4 Matrices: Basic OperationsA matrixis a rectangular array of numbers.The anatomy of a matrixcol col col12 3 -312531= 232221131211aaaaaarow dimension: 2column dimension: 3dimensionsof matrix: 2 ×3 ("two by three")a square matrixhas the same number of rows as columnsOperations on matricesAddition and subtraction(element-by-element)-312531+ --1321= -______721If dimensions are different, addition and subtraction are undefined4-4p. 1each elementhas a name:row 1 row 2 Scalar multiplicationMultiply a matrixby a number(element-by-element):3-312531= ________93Matrix multiplication(row and column inner products):-312531--21131= -12-312531--21131=...
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## This note was uploaded on 12/11/2011 for the course MATH 1324 taught by Professor Staff during the Spring '11 term at Austin Community College.

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4-4 - 4-4 Matrices Basic OperationsA matrixis a rectangular...

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