Algorithms For Dummies

 

»

load_boston()

: Regression analysis with the Boston house-prices dataset

 

»

load_iris()

: Classification with the iris dataset

 

»

load_diabetes()

: Regression with the diabetes dataset

 

»

load_digits([n_class])

: Classification with the digits dataset

 

»

fetch_20newsgroups(

subset='train'

):

 Data from 20 newsgroups

 

»

fetch_olivetti_faces()

:Olivetti faces dataset from AT&T

FIGURE 3-13: 

The files that you 

want to add to 

the repository 

appear as part of 

an upload list 

consisting of one 

or more 

filenames.

---

66

 

   

  PART 1 

 Getting Started

The technique for loading each of these datasets is the same across examples. The 

following example shows how to load the Boston house-prices dataset. You can 

find the code in the 

A4D; 03; Dataset Load.ipynb

 notebook.

from sklearn.datasets import load_boston

Boston = load_boston()

print(Boston.data.shape)

  

(506, 13)

To see how the code works, click Run Cell. The output from the 

print()

 call is 

(506, 13)

. You can see the output shown in Figure 3-14.

FIGURE 3-14: 

The Boston object 

contains the 

loaded dataset.

---

CHAPTER 4

  Introducing Python for Algorithm Programming 

     67

IN THIS CHAPTER

 

» Performing numeric and logic-based 

tasks

 

» Working with strings

 

» Performing tasks with dates

 

» Packaging code by using functions

 

» Making decisions and repeating steps

 

» Managing data in memory

 

» Reading data in storage objects

 

» Finding data faster by using 

dictionaries

Introducing Python for 

Algorithm Programming

A

 recipe is a kind of algorithm because it helps you cook tasty food by using 

a series of steps (and thereby get rid of your hunger). You can devise many 

ways to create a sequence of steps that solve a problem. Procedures of 

every variety and description abound, all of which describe a sequence of steps 

used to solve a problem. Not every sequence of steps is concrete. Mathematical 

notations present a series of steps to solve a numeric problem, but many people 

view them as so many oddly shaped symbols in an arcane language that few can 

understand. A computer language can turn the arcane language into a concrete 

form of English-like statements that solve the problem in a manner that works 

for most humans.

The previous chapter in this book, Chapter 3, helps you install a copy of Python 

to work with the examples in this book. You use Python throughout the book to 

solve  numeric  problems  using  algorithms  that  you  can  also  express  in 

Chapter 

4

---

68

 

   

  PART 1