# Import libraries and DataFrame
#
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
from pandas import DataFrame, Series
# Read the data from pokeman.csv into a DataFrame using pandas read_csv()
# Print out the first 6 lines of data using .head
df = pd.read_csv('pokeman.csv')
df.head(6)
# print out the data types of all features using .dtypes (no parentheses)
df.dtypes
# print out the column names using .columns
df.columns
# Create a pandas Series for the feature Speed; print out type
speedSeries = df.Speed
print (type(speedSeries))
print (speedSeries)
# Create a NumPy array for the feature Speed (use.values) ; print out type
speedArray = df.Speed.values
print (type(speedArray))
print (speedArray)
# Make 1D NumPy arrays from the features Attack and Defense and do a scatter plot
# using matplotlib
#
attack = df.Attack.values
defense = df.Defense.values
plt.scatter(attack,defense)
plt.xlabel("Attacks")
plt.ylabel("Defense")
# Create a new DataFrame "df_mod" which is same as original but we drop "Type 2" feature; print out to check
df_mod = df.drop(columns="Type 2")
df_mod
# Import libraries and DataFrame
#
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
from pandas import DataFrame, Series
import seaborn as sns
# Read the data into a DataFrame
# Print out the first 5 lines of data
df = pd.read_csv('pokeman.csv')
df.head(6)
# Add a white grid to the background of Seaborn plots using set_style
sns.set_style('whitegrid')
# Make a scatter plot using Seaborn's relplot of Defense statistics (y-axis)
# vs Attacks Stats
sns.relplot(x='Attack', y='Defense', data=df)
# Repeat plot in previous cell but use color to indicate Type 1 (hue = )
sns.relplot(x='Attack', y='Defense', data=df,hue='Type 1')
# Make a category plot of Defense statistics vs Type 1 (non-numerical)
# Rotation labels on x-axis for readability using plt.xticks using plt.xticks(rotation=-45)
sns.catplot(x='Type 1',y='Defense',data=df)
plt.xticks(rotation=-45)
# Make a Bar graph of Defense statistics for Type 1
sns.barplot(x='Type 1', y='Defense', data=df)
# Make a violin plot of the Defense data for Type 1
sns.violinplot(x='Type 1',y='Defense',data=df)
plt.xticks(rotation=-45)
# Repeat the plot in the previous cell but change palette to 'prism' and change size
sns.violinplot(x='Type 1',y='Defense',data=df,palette='prism',height=300)
plt.xticks(rotation=-45)
# Overlaying plots - overlay violin plot of Defense with actual points
# To do this (1) increase figure size using ```plt.figure(figsize = (10,6) )```;
# (2) create violin plot and set inner = None to get rid of the bars inside violin plot;
# (3) rotate x-axis labels for readability;
# (4) create swarmplot for points and set ```color='k'``` to create the points in black;
# (5) add title "Defense Data for Type 1"
#
plt.figure(figsize=(10,6))
sns.violinplot(x='Type 1',y='Defense',data=df,inner=None)
plt.xticks(rotation=-45)
sns.swarmplot(x='Type 1',y='Defense',data=df,color='k')
plt.title("Defense Data for Type 1")
# Import libraries
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
from pandas import DataFrame, Series
import seaborn as sns
# Import LinearRegression function from scikit-learn
from sklearn.linear_model import LinearRegression
# Read in data from file insurance.csv and create a DataFrame; print out some lines
#
df = pd.read_csv('insurance.csv')
df.head(3)
# Set background grid for Seaborn plots
sns.set_style('whitegrid')
# Create scatter plot of charges vs BMI with color indiciating whether patient is
# smoker or not
sns.relplot(x='bmi', y='charges', data=df,hue='smoker')
# Get data to use for linear regression
# Right now we see if there is a relationship between insurance charges and bmi
charges = df.charges.values
bmi = df.bmi.values
print (charges)
print (bmi)
# Make bmi an n by 1 array and charges n by 1
n = len(charges)
charges = np.reshape(charges,(n,1))
bmi = np.reshape(bmi,(n,1))
print (charges)
print (bmi)
# Create model and fit data
lr = LinearRegression()
lr.fit(bmi,charges)
# write out equation of line
intercept = lr.intercept_
slope = lr.coef_
print (f'{intercept}+{slope}times bmi')
# Use regplot to plot data and line
sns.regplot(x='bmi',y='charges',data=df)
# predict insurance costs for a person with BMI 31.7; round answer to nearest cent
eval = [31.7]
eval = np.reshape(eval, (1,1))
charge = lr.predict(eval)
print (charge)
#
# Note that this value agrees with plot above because when x=31.7 y is around 14,000