An Introduction to Python For Undergraduate Engineers/Matrices
Matrices can be created in the following way:
mymatrix = Matrix([[1,2],[3,4]])
In this example, [1,2] produces the first line of the matrix and [2,3] creates the second.
Quick Standard MatricesEdit
The following built in functions can be used to quickly create some standard matrices of specified size.
Command | Description | Example |
---|---|---|
eye() | Identity Matrix | eye(4) creates a 4x4 identity matrix |
zeros() | Empty Matrix | zeros(2,3) creates a 2x3 matrix of zeros |
ones() | Matrix of 1s | ones(2) creates a 2x2 matrix of ones |
Getting the Size of a MatrixEdit
You can find out the size of a matrix using the .shape[] command, for example:
mymatrix.shape[0]
Command | Description |
---|---|
.shape[0] | Gives number of rows |
.shape[1] | Gives number of columns |