Abstract definition of matrix multiplication
In the following tables, matrix [http://wiki.apache.org/hama-data/attachments/MatrixMultiply/attachments/matrix_a.gif] represents the quantities of the materials P and Q to produce products M and N. Matrix [http://wiki.apache.org/hama-data/attachments/MatrixMultiply/attachments/matrix_b.gif] represents the prices of the materials P and Q of the suppliers C1 and C2.
In this case, the first row of the second column of AB, aq + bs, represents the total cost of the producing product A.
Product\Resource |
}}} P {{{
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}}} Q {{{
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}}} M {{{
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}}} a {{{
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}}} b {{{
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}}} N {{{
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}}} c {{{
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}}} d {{{
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Resource\Company |
}}} C1 {{{
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}}} C2 {{{
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}}} P {{{
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}}} p {{{
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}}} q {{{
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}}} Q {{{
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}}} r {{{
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}}} s {{{
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See how to [:MatMult: multiply matrices] using Map/Reduce