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How can I represent matrices in python?
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In Python, Matrix is represented by the list data type. We are going to teach you how to create a 3x3 matrix using the list. The matrix is made up of three rows and three columns.
The numpy ndarray class is used to represent both matrices and vectors. To construct a matrix in numpy we list the rows of the matrix in a list and pass that list to the numpy array constructor. The first slice selects all rows in A, while the second slice selects just the middle entry in each row.
You can use numpy. First, convert your list into numpy array. Then, take an element and reshape it to 3x3 matrix.
Take a look at this answer:
from numpy import matrix from numpy import linalg A = matrix( [[1,2,3],[11,12,13],[21,22,23]]) # Creates a matrix. x = matrix( [[1],[2],[3]] ) # Creates a matrix (like a column vector). y = matrix( [[1,2,3]] ) # Creates a matrix (like a row vector). print A.T # Transpose of A. print A*x # Matrix multiplication of A and x. print A.I # Inverse of A. print linalg.solve(A, x) # Solve the linear equation system. Python doesn't have matrices. You can use a list of lists or NumPy
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