Matrix |
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An array of numbers is called a matrix. |

Figure 1. |
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Here, we have some data organized in a table. It could be rewritten in a matrix:

Figure 2. |
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Matrices are usually described by their dimensions.

Figure 3. |
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Each entry in a matrix is called an element.

Figure 4. |
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Here are three examples of matrices with different dimensions:

Figure 5. |
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