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Let’s build a custom text classifier using sklearn.

Let’s build a custom text classifier using sklearn. We will create a sklearn pipeline with following components: cleaner, tokenizer, vectorizer, classifier.

It’s becoming increasingly popular for processing and analyzing data in NLP. Unstructured textual data is produced at a large scale, and it’s important to process and derive insights from unstructured data. To do that, you need to represent the data in a format that can be understood by computers. NLP can help you do that. In this tutorial, you’ll learn: What the foundational terms and concepts in NLP are. How to implement those concepts in spaCy.

NLTK is a Python library that offers many standard NLP tools (tokenizers, POS taggers, parsers, chunkers and others). It comes with samples of several dozens of text corpora typically used in NLP applications, as well as with interfaces to dictionary-like resources such as WordNet and VerbNet. NLTK is well documented, so you might not need this book initially.

You’d be hard pressed to find a professional data science team not using NLP in one form or another. It is for this reason I have set out to produce a gentle introduction to the subject, both its concepts and application. This post covers some basic methods and tools for a barebones beginner. If you are a more advanced practitioner you might want to move on to Part 2: Vector Representations, or Part 3: Pipelines and Topic Modeling of this series. Like any area of study, NLP has its own jargon,.

NLTK defines an infrastructure that can be used to build NLP programs in Python

Getting Started with Python. NLTK defines an infrastructure that can be used to build NLP programs in Python.

We will learn to use Gensim dictionaries and Tf-Idf Model. Introduction to Gensim. It uses top academic models to perform complex tasks, like building document or word vectors (corpora) and performing topic identification, document comparison

However, machine learning algorithms only understand numbers, not words.

However, machine learning algorithms only understand numbers, not words. How do we translate our headlines into something an algorithm can understand? The first step is to create something called a bag of words matrix. A bag of word matrix gives us a numerical representation of which words are in which headlines.

A token is a combination of continuous characters, with some meaning. It is up to you to decide how to break a sentence into tokens. For instance, an easy method is to split a sentence by whitespace to break it into individual words. In the NLTK library, you can use the word tokenize() function to convert a string to tokens.

automated computational assessment of various emotions and opinions found in the text to determine the author’s attitude (utral) towards a particular topic or product.

Easy Natural Language Processing in Python


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Easy Natural Language Processing in Python
MP4 | Video: AVC 1280x720 | Audio: AAC 44KHz 2ch | Duration: 1.5 Hours | 246 MB
Genre: eLearning | Language: English
A-Z guide to practical NLP: spam detection, sentiment analysis, article spinners, and latent semantic analysis.
In this course you will build MULTIPLE practical systems using natural language processing, or NLP. This course is not part of my deep learning series, so there are no mathematical prerequisites - just straight up coding in Python. All the materials for this course are FREE.
After a brief discussion about what NLP is and what it can do, we will begin building very useful stuff. The first thing we'll build is a spam detector. You likely get very little spam these days, compared to say, the early 2000s, because of systems like these.
Next we'll build a model for sentiment analysis in Python. This is something that allows us to assign a score to a block of text that tells us how positive or negative it is. People have used sentiment analysis on Twitter to predict the stock market.
We'll go over some practical tools and techniques like the NLTK (natural language toolkit) library and latent semantic analysis or LSA.
Finally, we end the course by building an article spinner. This is a very hard problem and even the most popular products out there these days don't get it right. These lectures are designed to just get you started and to give you ideas for how you might improve on them yourself. Once mastered, you can use it as an SEO, or search engine optimization tool. Internet marketers everywhere will love you if you can do this for them!
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Easy Natural Language Processing in Python