def show_types(limit):
"""
Shows all the data labels and types in PyDataset
:param limit:int, specifies how many of data() to show
:return: void
"""
pydataset_labels = data()['dataset_id']
for label in pydataset_labels[:limit]:
all_data = data(label)
print label + ' has shape ' + str(all_data.shape[0]) + ',' + str(all_data.shape[1]) + ' types are '+ ','.join(
[str(type(list(all_data[i])[0])) for i in all_data.columns.values])
print ""
def train_iris(classifier, prediction_label):
classifier_base_name = 'PyDataset_iris_'
iris = data('iris')
X = np.array(iris)[:, :4]
labels = np.array(iris)[:, 4]
unique_labels = list(set(labels))
for label_i in unique_labels:
y = np.array([i == label_i for i in labels])
PyDatasetSchool.basic_train((X, y), classifier_base_name + label_i, classifier, prediction_label)
# |||||||||||||||||||||||||||||||||||||||||||||||||||||||
# |||||||||||||||||||||||||||||||||||||||||||||||||||||||
# For several of the following exercises, you'll need to load several datasets
# using the pydataset library. (If you get an error when trying to run the import
# below, use pip to install the pydataset package.)
from pydataset import data
# When the instructions say to load a dataset, you can pass the name of the dataset
# as a string to the data function to load the dataset.
# You can also view the documentation for the data set by passing
# the show_doc keyword argument.
# data('mpg', show_doc=True) # view the documentation for the dataset
mpg = data('mpg') # load the dataset and store it in a variable
All the datasets loaded from the pydataset library will be pandas dataframes.
# 1 - Copy the code from the lesson to create a dataframe full of student grades.
# a - Create a column named passing_english that indicates whether
# each student has a passing grade in reading.
# b - Sort the english grades by the passing_english column. How are duplicates handled?
# c - Sort the english grades first by passing_english and then by student name.
# All the students that are failing english should be first,
# and within the students that are failing english they should be
# ordered alphabetically. The same should be true for the students
# passing english. (Hint: you can pass a list to the .sort_values method)
# d - Sort the english grades first by passing_english, and then by the actual
# english grade, similar to how we did in the last step.
sns.relplot(x='x', y='y', style='dataset', hue='dataset', data=set_0)
sns.pairplot(set_0)
# !pip install pydataset
# had problems - fixed - there were two Python installs
# INSECT SPRAY SET
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
from pydataset import data
insect_spray = data('InsectSprays')
insect_spray.head()
# -- READING SHOWING DOCUMENTATION
data("InsectSprays", show_doc=True)
insect_spray.groupby('spray').describe()
# -- BOX PLOTS ---
plt.figure(figsize=(12, 10)) # this makes it larger than default
sns.boxplot(data=insect_spray, y='count', x='spray')
# -- Load the swiss dataset and read it's documentation.
# Create visualizations to answer the following questions:
#Topic: Data Sets in Python
#-----------------------------
#https://github.com/iamaziz/PyDataset
#libraries
import numpy as np
import pandas as pd
import pydataset
from pydataset import data
data('iris')
data('iris', show_doc=True)#help
#better way
from pydataset import data
data()
alldatasets = data().copy()
type(alldatasets)
from pydataset import data
data('iris')
data('marketing')
data('titanic')
alldatasets.head()
#check for availability
data('iris')
data('mtcars')
data('ais')
#Topic ----K Means Clustering
#https://www.analyticsindiamag.com/beginners-guide-to-k-means-clustering/
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from pydataset import data
iris = data('iris')
data = iris
data.head()
data.columns
data.dtypes
data.shape
#%%%K-Means Algorithm
#Selecting an appropriate value for K which is the number of clusters or centroids
#Selecting random centroids for each cluster
#Assigning each data point to its closest centroid
#Adjusting the centroid for the newly formed cluster in step 4
#Repeating step 4 and 5 till all the data points are perfectly organised within a cluster space
#%%%
#Dropping the 'Species' column
iris_clustering = iris.drop(columns=['Species'])
iris_clustering
#Selecting 2 random features from the dataset for clustering
#Here we choose Sepal Length @ column 0 and Petal Length @ column 2
X = iris_clustering.iloc[:, [0, 2]].values
X
#We only chose 2 features as we are going to plot in 2D space. The algorithm will work for any number of features.
#%%Initialising K-Means With Optimum Number Of Clusters
#Fitting K-Means to the dataset
import pandas as pd
import numpy as np
import seaborn as sns
from scipy import stats
from statsmodels.formula.api import ols
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error, r2_score, explained_variance_score
from sklearn.feature_selection import f_regression
import matplotlib.pyplot as plt
from pydataset import data
import warnings
warnings.filterwarnings('ignore')
tips = data('tips')
bill = tips['total_bill']
tip = tips['tip']
regr = ols('tip ~ total_bill', data=tips).fit()
tips['yhat'] = regr.predict(tips['total_bill'])
def plot_residuals(x, y, dataframe):
sns.residplot(x, y, data=dataframe)
plt.show()
def regression_errors(y, yhat):
sse = ((y - yhat)**2).sum()
ess = ((yhat - y.mean())**2).sum()
tss = sse + ess
mse = mean_squared_error(y, yhat)
def plotTinatic():
#pydataset.data('titanic', show_doc=True)
titanic = pydataset.data('titanic')
#titanic['class'].value_counts().plot(kind='bar')
titanic.groupby('survived')['class'].value_counts().plot(kind='bar')
plt.show()
del df['sigla']
df
# In[2]:
import pydataset
# In[4]:
pydataset.data()
# In[6]:
type(pydataset.data())
# In[7]:
titanic = pydataset.data('titanic')
# In[10]:
from pydataset import data
import numpy as np
from sklearn.linear_model import LinearRegression
from sklearn.model_selection import train_test_split
from matplotlib import pyplot as plt
pima = data("Pima.tr")
print(pima)
pima.plot(kind="scatter", x="skin", y="bmi")
x_train, x_test, y_train, y_test = train_test_split(pima.skin, pima.bmi)
plt.scatter(x_train, y_train, label="Training Data", color='r')
plt.scatter(x_test, y_test, label="Testing Data", color='b')
plt.legend()
lr = LinearRegression()
lr.fit(x_train.values.reshape(-1, 1), y_train)
y_predicted = lr.predict(x_test.values.reshape(-1, 1))
plt.plot(x_test, y_predicted, color='r')
plt.scatter(x_test, y_test, color='b')
plt.show()
a = np.array([50])
print(a.ndim)
print(lr.predict(a.reshape(-1, 1)))
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sun Jun 30 12:32:24 2019
@author: yash_j1301
"""
#Multi-indexing
import numpy as np
import matplotlib.pyplot as plt
from pydataset import data
mtcars=data('mtcars')
mtcars.head(10)
dir(data)
iris=data('iris')
titanic=data('titanic')
titanic.head(100)
data1=mtcars.copy()
data1.columns #column names
data1.values #matrix of numerical values
data1.index #unique rows
data1.am.dtypes #data types
data1[['am','cyl','mpg','hp','drat','disp','wt','qsec','vs','gear','carb']].astype('category') #converting list to category
data1.dtypes #data types of the dataframe
data2=data1.reset_index() #resetting the previously set indexes of the dataframe
data2.index
data2.iloc[0:3,0:4] #index column created
def load_data(self,dataset_name):
df = data(str(dataset_name))
df.columns = df.columns.str.replace('.','_')
df.columns = df.columns.str.lower()
return df
# plt.savefig("bar2.pdf")
# plt.show()
plt.clf(); plt.close()
crime[["Robbery", "Aggravated-assault", "Vehicle-Theft"]].plot(kind='box')
plt.savefig("box1.pdf")
plt.clf(); plt.close()
crime[["Robbery", "Aggravated-assault", "Vehicle-Theft"]].plot(kind='box',
vert=False, rot=30)
plt.savefig("box2.pdf")
plt.clf(); plt.close()
plt.show()
# Hair and Eye color scatter plot
hec = data("HairEyeColor")
X = np.unique(hec["Hair"], return_inverse=True)
Y = np.unique(hec["Eye"], return_inverse=True)
hec["Hair"] = X[1]
hec["Eye"] = Y[1]
hec.plot(kind="scatter", x="Hair", y="Eye", s=hec["Freq"]*20)
plt.xticks([0,1,2,3], X[0])
plt.yticks([0,1,2,3], Y[0])
plt.savefig("HairEyeColorscatter.png")
##########Plots for Data Visualization Section###########
data('Icecream').plot(kind='scatter', x='temp', y='cons')
plt.savefig('Nolabels.png')
msleep = data('msleep')
msleep.plot(y='sleep_total', title='Mammalian Sleep Data', legend=False)
def from_uri(cls, uri: str, **kwargs) -> "PyDataSet":
dataset_name = uri.split("://")[1]
data = pydataset.data(dataset_name)
return PyDataSet(inner_data=data, uri=uri)
dict1 = {'rollno':[1,2,3], 'name':['India','Pakistan','England'], 'captain': ['C1','C2','C3']}
print(dict1)
dict1['rollno']
#%%
import numpy as np
np.arange(1,10)
import pandas as pd
link1 = 'https://raw.githubusercontent.com/DUanalytics/datasets/master/csv/buyPC.csv'
df1 = pd.read_csv(link1)
df1.head()
from pydataset import data
data('mtcars')
mtcars1 = data('mtcars')
mtcars1.describe()
mtcars1.columns
#summary
mtcars1.groupby(['cyl','gear']).agg({'mpg':'mean', 'gear':'size'})
pd.crosstab(mtcars1.cyl, mtcars1.gear)
import matplotlib.pyplot as plt
import seaborn as sns
sns.heatmap(mtcars1.corr(), annot=True)
mtcars1.gear.value_counts().plot(kind='bar')
mtcars1.plot.scatter(x='wt', y='mpg')
mtcars1.groupby(['gear','cyl']).size().unstack().plot.bar()
def load_from_pydataset(self, dataset: str):
self.data_frame = pydataset.data(dataset)
#Topic:Pandas DF
#-----------------------------
#libraries
import numpy as np #import NumPy library
import pandas as pd
#pandas DF are combination of panda Series..
#one column data is a Series of one datatype, DF can have multiple data types
#pip install pydataset #install pydataset
from pydataset import data #importing dataset
mtcars = data('mtcars') #copying mtcars data to mtcars object
mtcarsDF = mtcars
mtcarsDF
#%%describing
mtcarsDF.shape #get number of rows and columns
mtcarsDF.head(3) #get top 3 rows
mtcarsDF.tail(4) #get bottom 4 rows
mtcarsDF.describe()
mtcarsDF.columns #column names
mtcarsDF.dtypes #columns with their datatypes
mtcarsDF.index #here index by rownames
type(mtcarsDF)
mtcarsDF.select_dtypes(include=['int64'])
mtcarsDF.select_dtypes(exclude=['int64'])
mtcarsDF.isna()
mtcarsDF.notna()
id(mtcarsDF)
mtcars.empty
mtcars.size
query = 'SELECT * FROM employees LIMIT 5 OFFSET 50'
# In[5]:
pd.read_sql(query, url)
# In[6]:
pd.read_sql('SHOW TABLES', url)
# ## 1. Load the mpg dataset. Read the documentation for it, and use the data to answer these questions:
# In[7]:
from pydataset import data
mpg = data('mpg')
data('mpg', show_doc=True)
# - On average, which manufacturer has the best miles per gallon?
# In[8]:
mpg.groupby('manufacturer').hwy.agg(['median']).nlargest(n=1, columns="median")
# - How many different manufacturers are there?
# In[9]:
mpg.manufacturer.nunique()
# - How many different models are there?
# # Do automatic or manual cars have better miles per gallon?
# def simple_trans(trans):
# if trans[:4] == 'auto':
# return 'auto'
# else:
# return 'manual'
# new_trans = mpg_df.trans.apply(simple_trans)
# print(mpg_df.assign(trans2 = mpg_df.trans.apply(simple_trans)).groupby('trans2')['avg_mpg'].mean().idxmax())
# Load the Mammals dataset. Read the documentation for it,
# and use the data to answer these questions:
mammals_df = data('Mammals')
data('Mammals', show_doc=True)
# print(mammals_df)
# # How many rows and columns are there?
# mammals_df.info()
# # 107 rows and 4 columns
# # What are the data types?
# # float and boolean
# # What is the the weight of the fastest animal?
# print(mammals_df.loc[mammals_df['speed'] == mammals_df['speed'].max()])
# print('-------------')
# # weight is 55 kg
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import StandardScaler
from sklearn.metrics import classification_report, confusion_matrix
from pydataset import data
import pandas as pd #pandas used for data manipulation
#scaler = StandardScaler()
import time #clock
import os
import psutil
time_start = time.clock()
#TITANIC DATASET
#data('titanic', show_doc=True) #can predict if they survived can do males and females separetely
titanictemp = data('titanic')
y = pd.factorize(titanictemp['survived'])[0]
clas = pd.factorize(titanictemp['class'])[0]
age = pd.factorize(titanictemp['age'])[0]
sex = pd.factorize(titanictemp['sex'])[0]
titanic = pd.DataFrame()
titanic['age'] = age
titanic['class'] = clas
titanic['sex'] = sex
titanic['survived'] = y # 0 = survived, 1 = died
dt = DecisionTreeClassifier()
X = titanic.iloc[:, 0:3]
y = titanic['survived']
import seaborn as sns
import matplotlib.pyplot as plt
import pandas as pd
from pydataset import data
iris = data("iris")
iris = data("iris", show_doc=True) #viewing iris docs
iris.columns #viewing column_names
# What does the distribution of petal lengths look like?
sns.distplot(iris["Petal.Length"])
# Is there a correlation between petal length and petal width?
iris_corr = iris.corr() #check contingency tables
petal_lengthwidth = pd.crosstab(iris_corr["Petal.Length"],
iris_corr["Petal.Width"])
sns.heatmap(petal_lengthwidth, annot=False)
# Would it be reasonable to predict species based on sepal width and sepal length?
# Which features would be best used to predict species?
sns.relplot(x="Sepal.Length", y="Sepal.Width", data=iris, hue="Species")
sepals_corr = pd.crosstab(iris["Sepal.Length"],
iris["Sepal.Width"],
normalize=True)
sepals_corr
sns.heatmap(sepals_corr)
#Method 3 - quantile method
Q1 = pd.Series(marks1).quantile(0.25)
Q3 = pd.Series(marks1).quantile(0.75)
Q1, Q3
IQR = Q3 - Q1
IQR
IQR2 = stats.iqr(pd.Series(marks1))
IQR2
#outlier : < Q1 - 1.5*IQR or > Q3 + 1.5*IQR
(marks1 < Q1 - 1.5 * IQR) | (marks1 > Q3 + 1.5 * IQR)
#dataframe
from pydataset import data
data(
'Boston'
) #https://www.engineeringbigdata.com/boston-dataset-scikit-learn-machine-learning-in-python/#:~:text=The%20sklearn%20Boston%20dataset%20is,and%20descriptions%20of%20each%20column.
boston = data('Boston')
boston.head()
boston.columns
#box plot
sns.boxplot(x=boston['dis'])
# plot shows three points between 10 to 12, these are outliers as there are not included in the box of other observation i.e no where near the quartiles.
#scatterplot
boston.columns
fig, ax = plt.subplots(figsize=(16, 8))
ax.scatter(boston['indus'], boston['tax'])
ax.set_xlabel('Proportion of non-retail business acres per town')
ax.set_ylabel('Full-value property-tax rate per $10,000')
# -*- coding: utf-8 -*-
"""
Created on Tue May 14 09:14:31 2019
@author: daver
"""
from pydataset import data
faithful = data('faithful', show_doc=True)
from scipy.stats import pearsonr
from sklearn.metrics import mean_squared_error
from sklearn import linear_model
import matplotlib.pyplot as plt
from math import sqrt
corr = pearsonr(faithful.waiting, faithful.eruptions)
reg = linear_model.LinearRegression()
reg.fit(faithful[['waiting']],
faithful.eruptions) #need a dataframe for x,not series
y_actual = reg.predict(faithful[['waiting']])
rms = sqrt(mean_squared_error(faithful.eruptions, y_actual))
plt.scatter(faithful.waiting, faithful.eruptions, c="blue")
plt.plot(faithful.waiting, y_actual, c="red")
plt.title("Predicted time between eruptions")
plt.ylabel("#of eruptions")
plt.yticks(range(1, 7))
plt.text(50, 5.5, 'RMSE:{:.2}'.format(rms))
plt.show()
users.merge(drop_roles, how='left', indicator=True)
'''
id name _merge
0 1 bob left_only
1 2 joe left_only
2 3 sally left_only
3 4 adam left_only
4 5 jane left_only
5 6 mike left_only
'''
# Trying to join when foriegn keys are deleted removes the ability for
# pandas to merge the dataframes. Instead, it defaults to just stacking the
# elements and placing NaN values for any missing values.
#5 Load mpg dataset from pydataset
mpg = data('mpg')
#6 output and read the documenation for the mpg dataset
data('mpg', show_doc = True) # check the documentation
'''
PyDataset Documentation (adopted from R Documentation. The displayed examples are in R)
## Fuel economy data from 1999 and 2008 for 38 popular models of car
### Description
This dataset contains a subset of the fuel economy data that the EPA makes
available on http://fueleconomy.gov. It contains only models which had a new
release every year between 1999 and 2008 - this was used as a proxy for the
popularity of the car.
#!/usr/bin/env python
# coding: utf-8
# In[1]:
import pandas as pd
import pydataset
# In[2]:
titanic = pydataset.data('titanic')
# In[3]:
titanic.columns
# In[4]:
titanic['class'].describe()
# In[5]:
#this exercise is to practice and learn data sets, understand how they store
#data, and retrieve it
#dataset included in python
from pydataset import data
df = data('titanic')
print(df)
#python : Topic :Decision Tree using mtcars
#standard libaries
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from pydataset import data
import seaborn as sns #enhances graphing features
df = data('mtcars')
df.head()
#from sklearn.tree import DecisionTreeClassifier, export_graphviz
from sklearn.model_selection import train_test_split
from sklearn import metrics, tree
df['am'].value_counts() # am = automatic
df.columns
#classification
#predict if transmission of car is 0 or 1 on basis of mpg, hp, wt
X1 = df[['mpg','hp','wt']]
Y1 = df['am']
Y1.value_counts()
type(Y1)
type(X1)
#for splitting into train and test
from sklearn.model_selection import train_test_split
X1_train, X1_test, Y1_train, Y1_test = train_test_split(X1, Y1, test_size=.20)
X1_train.shape
X1_test.shape
#classification tree
from env import host, user, password
import seaborn as sns
import numpy as np
from scipy import stats
from statsmodels.formula.api import ols
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error, r2_score, explained_variance_score
from sklearn.feature_selection import f_regression
from math import sqrt
import matplotlib.pyplot as plt
import warnings
warnings.filterwarnings('ignore')
from pydataset import data
df = data('tips')
# 2. Fit a linear regression model (ordinary least squares) and compute yhat, predictions of tip using total_bill. You may follow these steps to do that:
# import the method from statsmodels: from statsmodels.formula.api import ols
# fit the model to your data, where x = total_bill and y = tip: regr = ols('y ~ x', data=df).fit()
# compute yhat, the predictions of tip using total_bill: df['yhat'] = regr.predict(df.x)
#Descriptive
df.head()
df.columns.values
df.shape
df.describe()
df.info()
print(df.isnull().sum())
df.total_bill.value_counts(ascending=True)
from pydataset import data
import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
from evaluate import regression_errors
from sklearn.linear_model import LinearRegression
faithful = data('faithful')
pearsons_r = faithful.eruptions.corr(faithful.waiting)
sns.scatterplot(x='waiting', y='eruptions', data=faithful)
plt.show()
reg = LinearRegression()
reg.fit(faithful[['waiting']], faithful[['eruptions']])
y_pred = reg.predict(faithful[['waiting']])
faithful['predicted'] = y_pred
sns.scatterplot(x='waiting', y='predicted', data=faithful, alpha=0.8)
sns.scatterplot(x='waiting', y='eruptions', data=faithful)
plt.title('Waiting Time Between Geyser Eruptions at Old Faithful')
plt.yticks(np.arange(0, 6))
rmse = regression_errors(faithful.eruptions, faithful.predicted)[4]
blue_patch = mpatches.Patch(color='blue', label='Predicted')
orange_patch = mpatches.Patch(color='orange', label='Actual')
plt.legend(handles=[blue_patch, orange_patch])
plt.annotate(s=f'RMSE: {rmse}', xy=(72, 1))
#Muli Index
#-----------------------------
#% Multindex in Pandas DF
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from pydataset import data
data('iris')
data('titanic')
#https://github.com/iamaziz/PyDataset/blob/master/examples/sample-datasets.ipynb
mtcars = data('mtcars')
mtcars.head()
#mtcars.to_csv('data/mcarsdataset.csv')
data1 = mtcars
#describe data
data1.columns #col names
data1.values# values of DF
data1.index
data1.dtypes
data1[['am','vs','cyl','gear','carb']] = data1[['am','vs', 'cyl','gear', 'carb']].astype('category')
#data1[['am','vs', 'cyl','gear', 'carb']].astype('category', inplace=False)
data1.dtypes
data1.iloc[0:3,0:4]
#reset the index : index to column
data2 = data1.reset_index()
data2.iloc[0:3,0:4]
data2.columns
data2.rename({'index':'carname'},inplace=True, axis='columns')
#rename index column to carname : old to new
data2.head()
plt.title('Total Bill vs Tip Amount')
tips.head()
sns.relplot(data=tips, y='tip', x='total_bill', hue='size')
sns.relplot(data=tips, y='tip', x='total_bill', hue='size', style='time')
sns.relplot(data=tips,
y='tip',
x='total_bill',
hue='size',
style='time',
col='smoker')
sns.relplot(data=tips, y='tip', x='total_bill', style='size')
get_ipython().run_line_magic('pinfo', 'sns.relplot')
tips[['total_bill', 'tip']]
tips[['total_bill', 'tip']].corr()
from pydataset import data
data('mpg')
cars
cars = data('mpg')
cars.head()
cars.corr()
from matplotlib import cm
sns.heatmap(cars.corr(), cmap=cm.PiYG, annot=True, center=0)
sns.heatmap(cars.corr(), cmap=cm.PiYG, annot=True, center=0)
cm.PiYG
from matplotlib import cm
sns.heatmap(cars.corr(), cmap=cm.Blues, annot=True, center=0)
sns.heatmap(cars.corr(), cmap=cm.Blues, annot=True, center=0)
sns.distplot(cars.hwy)
sns.boxplot(data=tips, y='tip')
sns.boxplot(data=tips, y='tip', x='time')
sns.boxplot(data=tips, y='time', x='tip')
def get_db_url(username, hostname, password, database):
url = f'mysql+pymysql://{username}:{password}@{hostname}/{database}'
return url
def remove_commas_and_dollarsign(string_num):
"""
Cleans off a starting $ and commas where-ever they are. Takes a string, returns a string
"""
x = string_num.replace(',','')
x = x.strip("$")
return x
######################
#####the main script!
mpg = data('mpg')
# 1
# On average, which manufacturer has the best miles per gallon?
# This groups the manufacturers by their hwy mileage.
mpg.groupby('manufacturer').hwy.agg(['min', 'mean', 'max'])
# I'm gonna have to make a new column that is the average of city and highway mileage.
mpg['mileage'] = (mpg['cty'] + mpg['hwy']) / 2
#Let's group the on this new column
mpg.groupby('manufacturer').mileage.agg(['min', 'mean', 'max'])
#Now sort them and see who's at the bottom
mpg.groupby('manufacturer').mileage.agg(['min', 'mean', 'max']).sort_values(by='mean').tail(1)
#Looks like Honda is the winner
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
plt?
#%%basic scatter plot
x = [5,7,8,7,2,17,2,9,4,11,12,9,6]
y = [99,86,87,88,111,86,103,87,94,78,77,85,86]
plt.scatter(x, y)
plt.show();
#%%
#dataset
from pydataset import data
mtcars = data('mtcars')
#conda upgrade --all -y
df=mtcars
#%% scatter plot
#dim - x, y, shape(s), color(c), tranpsarency(alpha)
df.describe #summary
df.dtypes #data types
df.columns
df['wt']; df['mpg']
plt.scatter(x='wt', y='mpg', data=df)
plt.show();
df.carb
df.carb.value_counts()
# Change target to target_names & merge with main dataframe
df['species'] = pd.Categorical.from_codes(iris.target, iris.target_names)
df['species'].head()
#https://python-data-science.readthedocs.io/en/latest/datasets.html
#%%%
#not working
from rpy2.robjects import r, pandas2ri
def data(name):
return pandas2ri.ri2py(r[name])
#%%
#pip install pydataset
from pydataset import data
titanic = data('titanic')
titanic.head()
#%%%
from sklearn import datasets
load_boston() # Load and return the boston house-prices dataset (regression).
load_iris() # Load and return the iris dataset (classification).
load_diabetes() # Load and return the diabetes dataset (regression).
load_digits([n_class])# Load and return the digits dataset (classification).
load_linnerud() # Load and return the linnerud dataset (multivariate regression).
from sklearn.datasets import load_iris
iris = load_iris()
#%%
import seaborn as sns
def load_children(self):
for row in data().itertuples():
child = PydatasetNode(row[1], row[2], self)
if child:
self.add_child(child)
import pandas as pd
from pydataset import data
from matplotlib import pyplot as plt
import numpy as np
%matplotlib inline
# Problem 1
print "Problem 1:"
nottem_data = data('nottem')
VADeaths_data = data('VADeaths')
Arbuthnot_data = data('Arbuthnot')
#data('nottem', show_doc=True)
print 'Nottem:'
print 'This data set contains the monthly average air temperatures at Nottingham Castle for 20 years.'
print 'Since this data set consists of a single series, a line plot is best.'
nottem_data.plot(y='nottem',legend=False)
plt.show()
#data('VADeaths', show_doc=True)
print 'VA Deaths:'
print 'This data set contains death rates in Virginia in 1940, cross-classified \
by age group, gender, and urban/rural.'
print 'Since this data set contains multiple categories, a bar plot is more effective.'
VADeaths_data.iloc[:][['Rural Male','Rural Female','Urban Male','Urban Female']].plot(kind='bar')
plt.show()
#data('Arbuthnot', show_doc=True)
#Arbuthnot_data.plot(subplots=True, layout=(7,1))