Introduction to Data Science Using Python is a beginner-friendly guide designed to help readers understand essential data science concepts with a Python focus. This document covers data cleaning, data wrangling, exploratory data analysis, and visualization using libraries like NumPy, Pandas, Matplo...
Introduction to Data Science in Python
Welcome to the chapter on Introduction to Data Science and Development
Frameworks! This chapter will provide you with a solid understanding of the tools
and frameworks used in data science, with a focus on Python and R programming
languages.
First, let's talk about data manipulation and transformation. Data rarely comes in
a format that is ready for analysis, so it needs to be cleaned, transformed and
manipulated before any insights can be gained. In this chapter, you'll learn about
popular libraries such as Pandas, Numpy, and Tidyverse in Python and R
respectively. These libraries provide functionalities for data manipulation,
cleaning, and transformation.
For example, let's say you have a dataset of customer information and you want
to find out the average age of your customers. You would load your data into a
Pandas DataFrame, filter out any null or missing values, and then use
the mean() function to calculate the average age. Here is an example of how you
would do this in Python:
import pandas as pd
# Load the data into a Pandas DataFrame
df = pd.read_csv('customer_data.csv')
# Filter out any null or missing age values
df = df.dropna(subset=['age'])
# Calculate the average age of customers
avg_age = df['age'].mean()
print(f'The average age of customers is: {avg_age}')
Next, let's talk about data visualization. Visualization is a crucial part of data
science as it allows you to communicate your findings in a clear and intuitive
way. Popular libraries for data visualization include Matplotlib, Seaborn, and
ggplot in Python and R respectively.
For example, let's say you want to visualize the distribution of ages of your
customers. You would use a histogram to show the distribution of the ages. Here
is an example of how you would do this in Python using Matplotlib:
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