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Python Data Analysis

You're reading from   Python Data Analysis Perform data collection, data processing, wrangling, visualization, and model building using Python

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781789955248
Length 478 pages
Edition 3rd Edition
Languages
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Authors (2):
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Ivan Idris Ivan Idris
Author Profile Icon Ivan Idris
Ivan Idris
Avinash Navlani Avinash Navlani
Author Profile Icon Avinash Navlani
Avinash Navlani
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Toc

Table of Contents (20) Chapters Close

Preface 1. Section 1: Foundation for Data Analysis
2. Getting Started with Python Libraries FREE CHAPTER 3. NumPy and pandas 4. Statistics 5. Linear Algebra 6. Section 2: Exploratory Data Analysis and Data Cleaning
7. Data Visualization 8. Retrieving, Processing, and Storing Data 9. Cleaning Messy Data 10. Signal Processing and Time Series 11. Section 3: Deep Dive into Machine Learning
12. Supervised Learning - Regression Analysis 13. Supervised Learning - Classification Techniques 14. Unsupervised Learning - PCA and Clustering 15. Section 4: NLP, Image Analytics, and Parallel Computing
16. Analyzing Textual Data 17. Analyzing Image Data 18. Parallel Computing Using Dask 19. Other Books You May Enjoy

Normal distribution

Normal distributions occur frequently in real-life scenarios. A normal distribution is also known as a bell curve because of its characteristic shape. The probability density function models continuous distribution. The numpy.random subpackage offers lots of continuous distributions such as beta, gamma, logistic, exponential, multivariate normal, and normal distribution. The normal() functions find samples from Gaussian or normal distribution.

Let's write code for visualizing the normal distribution using the normal() function, as follows:

# Import required library
import numpy as np
import matplotlib.pyplot as plt

sample_size=225000

# Generate random values sample using normal distribution
sample = np.random.normal(size=sample_size)

# Create Histogram
n, bins, patch_list = plt.hist(sample, int(np.sqrt(sample_size)), density=True)

# Set parameters
mu, sigma=0,1

x= bins
y= 1/(sigma * np.sqrt(2 * np.pi)) * np.exp( - (bins - mu)**2 / (2 * sigma**2) )

# Plot line plot(or bell...
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