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Matrices
Matrices

Definition
A matrix is a rectangular group of numbers (or symbols) with a given number of rows and columns.
Example

The following matrix has two rows and three columns, and is described as a "two by three" (2x3) matrix.

LaTeX
\begin{bmatrix}
    3 & 6 & 2  \\
    5 & 1 & 10
\end{bmatrix}
Notation
  • There are a few different ways to represent a matrix. The easiest is with an bold uppercase letter: A
Code
A = [[3, 6, 2], [5, 1, 10]]

print(A)
Notes
  • The plural of matrix is matrices.
  • The size of a matrix is called its dimension or order. It is written with as rows x columns. A matrix with 2 rows and 3 columns is written as 2x3.
  • Two matrices are considered equal if and only if:
    • They have the same number of rows.
    • They have the same number of columns.
    • Each corresponding element is equal. i.e. x111 = x211
  • The numpy.matrix is depreciated, in favour of regular arrays
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