Posts about Array

RSS feed

Create A Sparse Matrix

Comments

Goal

This post aims to create a sparse matrix in python using following modules:

  • Numpy
  • Scipy

Reference:

  • Scipy Document
  • Chris Albon's blog (I look at his post's title and wrote my own contents to deepen my understanding about the topic.)

Library

In [8]:
import numpy as np
import scipy.sparse

Create a sparse matrix using csr_matrix

CSR stands for "Compressed Sparse Row" matrix

In [9]:
nrow = 10000
ncol = 10000

# CSR stands for "Compressed Sparse Row" matrix
arr_sparse = scipy.sparse.csr_matrix((nrow, ncol))
arr_sparse
Out[9]:
<10000x10000 sparse matrix of type '<class 'numpy.float64'>'
	with 0 stored elements in Compressed Sparse Row format>

Read more…