DEV Community

George Karanikolas
George Karanikolas

Posted on • Edited on

5 2

Tutorial NumPy

What is NumPy?

Numpy is the core library for scientific computing in Python. It provides a high-performance multidimensional array object, and tools for working with these arrays.

NumPy is often used along with packages like SciPy (Scientific Python) and Matplotlib (plotting library). This combination is widely used as a replacement for MatLab, a popular platform for technical computing. However, Python alternative to MatLab is now seen as a more modern and complete programming language.

Install NumPy

pip install numpy
Enter fullscreen mode Exit fullscreen mode

Import NumPy

import numpy as np
Enter fullscreen mode Exit fullscreen mode

Create Arrays

a = np.array([1,2,3])
b = np.array([(1.5,2,3), (4,5,6)], dtype = float)
c = np.array([[(1.5,2,3), (4,5,6)], [(3,2,1), (4,5,6)]], dtype = float)
d = np.array( [ [1,2], [3,4] ], dtype=complex )
Enter fullscreen mode Exit fullscreen mode

Print Arrays

>>> a = np.arange(6)                         # 1d array
>>> print(a)
[0 1 2 3 4 5]
>>>
>>> b = np.arange(12).reshape(4,3)           # 2d array
>>> print(b)
[[ 0  1  2]
 [ 3  4  5]
 [ 6  7  8]
 [ 9 10 11]]
>>>
>>> c = np.arange(24).reshape(2,3,4)         # 3d array
>>> print(c)
[[[ 0  1  2  3]
  [ 4  5  6  7]
  [ 8  9 10 11]]
 [[12 13 14 15]
  [16 17 18 19]
  [20 21 22 23]]]
Enter fullscreen mode Exit fullscreen mode

For many resources on NumPy or anything else on Python, check out Github:
https://github.com/SeijinD/Python-World/blob/master/main/extends_libraries/numpy.md

Billboard image

The Next Generation Developer Platform

Coherence is the first Platform-as-a-Service you can control. Unlike "black-box" platforms that are opinionated about the infra you can deploy, Coherence is powered by CNC, the open-source IaC framework, which offers limitless customization.

Learn more

Top comments (1)

Collapse
 
zenulabidin profile image
Ali Sherief

This is a great writeup! 👍

A Workflow Copilot. Tailored to You.

Pieces.app image

Our desktop app, with its intelligent copilot, streamlines coding by generating snippets, extracting code from screenshots, and accelerating problem-solving.

Read the docs