# VCU HGEN 619 - Matrix Algebra (37 pages)

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# Matrix Algebra

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## Matrix Algebra

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Pages:
37
School:
Virginia Commonwealth University
Course:
Hgen 619 - Quantitative Genetics
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Unformatted text preview:

Matrix Algebra HGEN619 class 2006 Heuristic You already know a lot of it Economical and aesthetic Great for statistics What you know All about 1x1 matrices Operation Example Addition Subtraction Multiplication Division 2 2 5 1 2x2 12 3 Result What you know All about 1x1 matrices Operation Example Result Addition Subtraction Multiplication Division 2 2 5 1 2x2 12 3 4 4 4 4 What you may guess Numbers can be organized in boxes e g 1 2 3 4 What you may guess Numbers can be organized in boxes e g 1 2 3 4 Matrix Notation A Many Numbers 31 23 16 99 08 12 14 73 85 98 33 94 12 75 02 57 92 75 11 28 39 57 17 38 18 38 65 10 73 16 73 77 63 18 56 18 57 02 74 82 20 10 75 84 19 47 14 11 84 08 47 57 58 49 48 28 42 88 84 47 48 43 05 61 75 98 47 32 98 15 49 01 38 65 81 68 43 17 65 21 79 43 17 59 41 37 59 43 17 97 65 41 35 54 44 75 49 03 86 93 41 76 73 19 57 75 49 27 59 34 27 59 34 82 43 19 74 32 17 43 92 65 94 13 75 93 41 65 99 13 47 56 34 75 83 47 48 73 98 47 39 28 17 49 03 63 91 40 35 42 12 54 31 87 49 75 48 91 37 59 13 48 75 94 13 75 45 43 54 32 53 75 48 90 37 59 37 59 43 75 90 33 57 75 89 43 67 74 73 10 34 92 76 90 34 17 34 82 75 98 34 27 69 31 75 93 45 48 37 13 59 84 76 59 13 47 69 43 17 91 34 75 93 41 75 90 74 17 34 15 74 91 35 79 57 42 39 57 49 02 35 74 23 57 75 11 35 Matrix Notation A Useful Subnotation A 2 2 Useful Subnotation A 8 40 Matrix Operations Addition Subtraction Multiplication Inverse Addition 1 2 3 4 A 5 6 7 8 B Addition 1 2 3 4 A 5 6 7 8 B 6 8 10 12 C Addition Conformability To add two matrices A and B of rows in A of rows in B of columns in A of columns in B Subtraction 5 6 7 8 B 1 2 3 4 A Subtraction 5 6 7 8 B 1 2 3 4 A 4 4 4 4 C Subtraction Conformability To subtract two matrices A and B of rows in A of rows in B of columns in A of columns in B Multiplication Conformability Regular Multiplication To multiply two matrices A and B of columns in A of rows in B Multiply A m x n by B n by

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