NumPy Array Tutorial - Python NumPy Array Operations and Methods

Learn about NumPy Array, NumPy Array creation, various array functions, array indexing & Slicing, array operations, methods and dimensions,It also includes array splitting, reshaping, and joining of arrays. Even the other external libraries in Python relate to NumPy arrays.

The most important feature of NumPy is the homogeneous high-performance n-dimensional array object. Data manipulation in Python is nearly equivalent to the manipulation of NumPy arrays. NumPy array manipulation is basically related to accessing data and sub-arrays. It also includes array splitting, reshaping, and joining of arrays. Even the other external libraries in Python relate to NumPy arrays.

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Numpy Array Basics

Arrays in NumPy are synonymous with lists in Python with a homogenous nature. The homogeneity helps to perform smoother mathematical operations. These arrays are mutable. NumPy is useful to perform basic operations like finding the dimensions, the bite-size, and also the data types of elements of the array.

NumPy Array Creation

1. Using the NumPy functions

NumPy has a variety of built-in functions to create an array.

a. Creating one-dimensional array in NumPy

For 1-D arrays the most common function is np.arange(..), passing any value create an array from 0 to that number.

1. import numpy as np
2. array=np.arange(20)
3. array

Output

array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,12, 13, 14, 15, 16, 17, 18, 19])

We can check the dimensions by using array.shape.

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The content present in the NumPy arrays can be made accessible, and also we can make changes thorough indexing as we got to know in the previous module. Another way of data manipulation in arrays in NumPy is though slicing through the arrays. We can also try changing the position of the elements in the array with the help of their index number. Slicing is the extension of python’s basic concept of changing position in the arrays of N-d dimensions.

NumPy is a Python library for numerical analysis of data. This NumPy tutorial will help you learn the basics of NumPy, install and import NumPy, and deal with NumPy arrays. You will get an idea to perform NumPy arithmetic operations and understand the different NumPy functions. Finally, you will implement some practical examples and build histograms using the matplotlib library. So, let's learn about the NumPy library in detail.

NumPy Releases First Review Paper On Fundamental Array Concepts. The library adds support for large, multi-dimensional arrays as well as matrices, and brings the computational power of languages like C and Fortran to Python.

Numpy is a python library used for computing scientific/mathematical data.

NumPy in Python explains what exactly is Numpy and how it is better than Lists. It also explains various Numpy operations with examples.