Examples

indices

import numpy as np

from spector import indices

ind = indices([0, 2])
ind

indices([2 0])

np.array(ind)

array([2, 0])

1 in ind

False

ind.add(1)

True

ind.todense()

array([ True,  True,  True])

indices.fromdense([True, False, True])

indices([2 0])

from spector import vector

vec = vector({0: 1.0, 2: 2.0, 4: 1.0})
vec

vector([4 2 0], [1. 2. 1.])

np.array(vec)

array([1., 2., 1.])

vec[2] += 1.0
vec[2]

3.0

vec.sum()

5.0

vec.todense()

array([1., 0., 3., 0., 1.])

vector.fromdense([1, 0, 2, 0, 1])

vector([4 2 0], [1. 2. 1.])

from spector import matrix

mat = matrix({0: {1: 2.0}})
mat

matrix(spector.vector.vector, {0: vector([1], [2.])})

mat.row, mat.col, mat.data

(array([0]), array([1]), array([2.]))