By Willi Richert, Luis Pedro Coelho
ISBN-10: 1784392774
ISBN-13: 9781784392772
Get extra out of your facts via developing useful computer studying structures with Python
About This Book
construct your individual Python-based laptop studying structures adapted to resolve any problem
realize how Python deals a a number of context resolution for create computing device studying systems
functional situations utilizing the main Python computing device studying libraries to effectively enforce on your projects
Who This booklet Is For
This booklet essentially objectives Python builders who are looking to examine and use Python's laptop studying functions and achieve priceless insights from facts to enhance potent suggestions for company problems.
In Detail
Using computer studying to achieve deeper insights from info is a key ability required by means of glossy program builders and analysts alike. Python is a superb language to advance laptop studying functions. As a dynamic language, it makes it possible for speedy exploration and experimentation. With its very good selection of open resource laptop studying libraries you could concentrate on the duty handy whereas having the ability to fast test many ideas.
This booklet indicates you precisely how to define styles on your uncooked facts. you are going to commence by way of brushing up in your Python laptop studying wisdom and introducing libraries. You'll quick familiarize yourself with critical, real-world initiatives on datasets, utilizing modeling, developing advice structures. afterward, the booklet covers complex themes corresponding to subject modeling, basket research, and cloud computing. those will expand your skills and make it easier to create huge advanced systems.
With this booklet, you achieve the instruments and realizing required to construct your personal structures, adapted to unravel your real-world information research problems.
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Additional resources for Building Machine Learning Systems with Python (2nd Edition)
Example text
At first, we will write classification code ourselves in order to understand the concepts, but we will quickly switch to using scikit-learn whenever possible. The goal is to first understand the basic principles of classification and then progress to using a state-of-the-art implementation. [ 29 ] Classifying with Real-world Examples The Iris dataset The Iris dataset is a classic dataset from the 1930s; it is one of the first modern examples of statistical classification. The dataset is a collection of morphological measurements of several Iris flowers.
The goals of a good feature are to simultaneously vary with what matters (the desired output) and be invariant with what does not. For example, compactness does not vary with size, but varies with the shape. In practice, it might be hard to achieve both objectives perfectly, but we want to approximate this ideal. You will need to use background knowledge to design good features. Fortunately, for many problem domains, there is already a vast literature of possible features and feature-types that you can build upon.
The search procedure: How do we find the model we need to use? In our case, we tried every possible combination of feature and threshold. You can easily imagine that as models get more complex and datasets get larger, it rapidly becomes impossible to attempt all combinations and we are forced to use approximate solutions. In other cases, we need to use advanced optimization methods to find a good solution (fortunately, scikit-learn already implements these for you, so using them is easy even if the code behind them is very advanced).