05_17-checkpoint.py

# Section 5.17 snippets

# 5.17.1 Sample Graphs for 600, 60,000 and 6,000,000 Die Rolls

# 5.17.2 Visualizing Die-Roll Frequencies and Percentages

# Launching IPython for Interactive Matplotlib Development


# Importing the Libraries
import matplotlib.pyplot as plt

import numpy as np

import random

import seaborn as sns

# Rolling the Die and Calculating Die Frequencies
rolls = [random.randrange(1, 7) for i in range(600)]

values, frequencies = np.unique(rolls, return_counts=True)

# Creating the Initial Bar Plot
title = f'Rolling a Six-Sided Die {len(rolls):,} Times'

sns.set_style('whitegrid')

axes = sns.barplot(values, frequencies, palette='bright')

# Setting the Window Title and Labeling the x- and y-Axes
axes.set_title(title)

axes.set(xlabel='Die Value', ylabel='Frequency')  

# Finalizing the Bar Plot
axes.set_ylim(top=max(frequencies) * 1.10)

for bar, frequency in zip(axes.patches, frequencies):
    text_x = bar.get_x() + bar.get_width() / 2.0  
    text_y = bar.get_height() 
    text = f'{frequency:,}\n{frequency / len(rolls):.3%}'
    axes.text(text_x, text_y, text, 
              fontsize=11, ha='center', va='bottom')
              
# Rolling Again and Updating the Bar Plot—Introducing IPython Magics
plt.cla()

%recall 5

rolls = [random.randrange(1, 7) for i in range(600)]

rolls = [random.randrange(1, 7) for i in range(60000)]

%recall 6-13

values, frequencies = np.unique(rolls, return_counts=True)
title = f'Rolling a Six-Sided Die {len(rolls):,} Times'
sns.set_style('whitegrid')
axes = sns.barplot(values, frequencies, palette='bright')
axes.set_title(title)
axes.set(xlabel='Die Value', ylabel='Frequency')  
axes.set_ylim(top=max(frequencies) * 1.10)
for bar, frequency in zip(axes.patches, frequencies):
    text_x = bar.get_x() + bar.get_width() / 2.0  
    text_y = bar.get_height() 
    text = f'{frequency:,}\n{frequency / len(rolls):.3%}'
    axes.text(text_x, text_y, text, 
              fontsize=11, ha='center', va='bottom')
              
# Saving Snippets to a File with the %save Magic 
%save RollDie.py 1-13





   

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