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# The Ultimate Beginner's Guide to NumPy Arrays

## Ultimate Guide to NumPy Arrays - VERY DETAILED TUTORIAL for beginners!

In this tutorial, we will learn about NumPy arrays in great detail! 🤓
NumPy is one of the most popular Python libraries and just as it sounds - it deals with numbers!
An array, on the other hand,  is a collection of items of the same type and it's the data structure that NumPy uses.
This video will give you the tools and demos to understand how NumPy manages data and how it approaches memory consumption.

We will explore different functions and methods to:
⭐ create N-dimensional arrays
⭐ reshape arrays
⭐ sort arrays with different algorithms
⭐ filter and manipulate array values

⏲️ TIME STAMPS ⏲️
__________________________________________
00:00 - intro
00:43 - install NumPy
01:02 - import NumPy
01:09 - create an array with NumPy arange
04:09 - create an array with NumPy array
04:27 - why arrays are better than lists
07:08 - NumPy data types
08:06 - 2 dimensional arrays
09:47 - shape attribute
10:38 - reshape arrays
12:33 - create empty arrays
14:14 - NumPy eye function
15:10 - change array values
18:41 - sort NumPy arrays
21:13 - difference between copy and view
23:50 - next NumPy tutorial and thank you for watching!

The goal of this Ultimate Guide (and all the future Ultimate Guides I'll be filming for other libraries) - is to cover a HUGE part of the NumPy documentation. It's meant for all the folks who learn by example rather than by reading dry text and hopefully this will take your NumPy skills to an expert level! 🥼🥼🥼

⭐ get complete tutorial code:
https://app.wayscript.com/lairs/3a425743-cffa-43cb-8ab2-67a5630fc799/public/

#numpy #pythong #programming

## Buddha Community  1595467140

## NumPy Array Tutorial - Python NumPy Array Operations and Methods

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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## Linear Algebra for Data Scientists with NumPy - Analytics India Magazine

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NumPy is an essential Python library to perform mathematical and scientific computations. NumPy offers Python’s array-like data structures with exclusive operations and methods. Many data science libraries and frameworks, including PandasScikit-Learn, Statsmodels, Matplotlib and SciPy, are built on top of NumPy with Numpy arrays in their building blocks. Some frameworks, including TensorFlow and PyTorch, introduce NumPy arrays or NumPy-alike arrays as their fundamental data structure in the name of tensors. How NumPy becomes the base of Data Science computing system (source)

Data Science relies heavily on Linear Algebra. NumPy is famous for its Linear Algebra operations. This article discusses methods available in the NumPy library to perform various Linear Algebra operations with examples. These examples assume that the readers have a basic understanding of NumPy arrays. Check out the following articles to have a better understanding of NumPy fundamentals:

#developers corner #linear algebra #matrices #numpy #numpy array #numpy dot product #numpy matrix multiplication #numpy tutorial #svd #vectors 1595235180

## NumPy Features - Why we should use Numpy?

Welcome to DataFlair!!! In this tutorial, we will learn Numpy Features and its importance.

NumPy is a library for the Python programming language, adding support for large, multi-dimensional arrays and matrices, along with a large collection of high-level mathematical functions to operate on these arrays

NumPy (Numerical Python) is an open-source core Python library for scientific computations. It is a general-purpose array and matrices processing package. Python is slower as compared to Fortran and other languages to perform looping. To overcome this we use NumPy that converts monotonous code into the compiled form. #### NumPy Features

These are the important features of NumPy:

#### 1. High-performance N-dimensional array object

This is the most important feature of the NumPy library. It is the homogeneous array object. We perform all the operations on the array elements. The arrays in NumPy can be one dimensional or multidimensional.

#### a. One dimensional array

The one-dimensional array is an array consisting of a single row or column. The elements of the array are of homogeneous nature.

#### b. Multidimensional array

In this case, we have various rows and columns. We consider each column as a dimension. The structure is similar to an excel sheet. The elements are homogenous.

#### 2. It contains tools for integrating code from C/C++ and Fortran

We can use the functions in NumPy to work with code written in other languages. We can hence integrate the functionalities available in various programming languages. This helps implement inter-platform functions.

#numpy tutorials #features of numpy #numpy features #why use numpy #numpy 1595235240

## NumPy Applications - Uses of Numpy

In this Numpy tutorial, we will learn Numpy applications.

NumPy is a basic level external library in Python used for complex mathematical operations. NumPy overcomes slower executions with the use of multi-dimensional array objects. It has built-in functions for manipulating arrays. We can convert different algorithms to can into functions for applying on arrays.NumPy has applications that are not only limited to itself. It is a very diverse library and has a wide range of applications in other sectors. Numpy can be put to use along with Data Science, Data Analysis and Machine Learning. It is also a base for other python libraries. These libraries use the functionalities in NumPy to increase their capabilities. #### 1. An alternative for lists and arrays in Python

Arrays in Numpy are equivalent to lists in python. Like lists in python, the Numpy arrays are homogenous sets of elements. The most important feature of NumPy arrays is they are homogenous in nature. This differentiates them from python arrays. It maintains uniformity for mathematical operations that would not be possible with heterogeneous elements. Another benefit of using NumPy arrays is there are a large number of functions that are applicable to these arrays. These functions could not be performed when applied to python arrays due to their heterogeneous nature.

#### 2. NumPy maintains minimal memory

Arrays in NumPy are objects. Python deletes and creates these objects continually, as per the requirements. Hence, the memory allocation is less as compared to Python lists. NumPy has features to avoid memory wastage in the data buffer. It consists of functions like copies, view, and indexing that helps in saving a lot of memory. Indexing helps to return the view of the original array, that implements reuse of the data. It also specifies the data type of the elements which leads to code optimization.

#### 3. Using NumPy for multi-dimensional arrays

We can also create multi-dimensional arrays in NumPy.These arrays have multiple rows and columns. These arrays have more than one column that makes these multi-dimensional. Multi-dimensional array implements the creation of matrices. These matrices are easy to work with. With the use of matrices the code also becomes memory efficient. We have a matrix module to perform various operations on these matrices.

#### 4. Mathematical operations with NumPy

Working with NumPy also includes easy to use functions for mathematical computations on the array data set. We have many modules for performing basic and special mathematical functions in NumPy. There are functions for Linear Algebra, bitwise operations, Fourier transform, arithmetic operations, string operations, etc.

#numpy tutorials #applications of numpy #numpy applications #uses of numpy #numpy 1601172000

## NumPy Releases First Review Paper On Fundamental Array Concepts

Recently, researchers at NumPy released its first-ever review paper “Array programming with NumPy” that is based on how a few fundamental array concepts lead to a simple and powerful programming paradigm for organising, exploring and analysing scientific data. The entire review paper has been published by the developers a few days ago after a gap of almost fifteen years since its inception.

Created in 2005, NumPy is an open-source project that aims to enable numerical computing with Python. In the current scenario, almost every scientist working in Python draws on the power of NumPy. 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.

From capturing the first image of a black hole to sport analytics, NumPy plays a significant role in research analysis pipelines including fields such as physics, astronomy, geoscience, biology, psychology, economy, engineering, finance and more.

#array programming #numpy #numpy array #numpy library python #python