Definition
Matrix has basis function . Every term is where and .
Example
>>> import numpy
>> numpy.vander([1, 2, 3, 4, 5], N=5, increasing=True)
array([[ 1, 1, 1, 1, 1],
[ 1, 2, 4, 8, 16],
[ 1, 3, 9, 27, 81],
[ 1, 4, 16, 64, 256],
[ 1, 5, 25, 125, 625]])