¶ Matrix
- A matrix / matrices is a rectangular array of numbres symbols or expressions arranged in rows and columns.
matrix.js
const matrix = list(
list(1, 2, 3),
list(4, 5, 6),
list(7, 8, 9),
);
- Rows and columns of a matrix are n-tuples.
In the above matrix, row 1 (r1) is (6, 2) and row 2 (r2) is (4,3). Column 1 (c1) is (6, 4) and c2 is (2,3).
¶ Basic matrix operations
-
Scalar multiplication is multiplying a real number by a matrix.
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The dot product is the result of summing the products of two equal length n-tuples. For example, the dot product of (2, 5) * (3, 1) = (2 * 3) + (5 * 1) = (6 + 5) = 11.
-
Matrix multiplication is the product of two matrices.
.
Notice how each entry in matrix C is the dot product of a row in matrix A and a column in matrix B