# column vector:
colVec = Matrix([1,2,3,4,5])
# Matrix
P = Matrix([[ ],
[ ],
[]])
# returns the shape of the matric
a.shape
colVec.shape
# returns the selected row or column
a.row(0)
a.col(0)
# inverse of a matrix
a**-1
# Transpose of a matrix
a.T
# Create the identity matrix
eye(3)
# Create an empty matrix
zeros(3,2)
# Create a matrix with ones
ones(4,2)
