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Text Analytics on Dataset
#DevConMru
Data ScienceBig
Processes and systems to extract knowledge or
insights from data
Large and complex data that has been collected
over several years
What is yelp ?
Dataset
yelp_academic_dataset_business – Business Information
yelp_academic_dataset_review – User Reviews
Combine the 2 using
DEMO
Text Analytics Methodologies
Natural Language Processing (NLP)
Part 1
Natural
Language
Processing
(NLP)
Microsoft Text Analytics
Sentiment Analysis
Keyword Extraction
Topic Detection
Language Detection
DEMO
Stemming
Revert the word into its original or root form
Stemming
(Results)
Common
Words
Removal
DEMO
Part 2
Natural
Language
Processing
(NLP)
Stanford CoreNLP
Part 2
Natural
Language
Processing
(NLP)
Stanford CoreNLP
Part of Speech
POS Tag Description Example
CC coordinating conjunction and
CD cardinal number 1, third
DT determiner the
EX existential there there is
FW foreign word d’hoevre
IN preposition/subordinating conjunction in, of, like
JJ adjective big
JJR adjective, comparative bigger
JJS adjective, superlative biggest
DEMO
Part 2
Natural
Language
Processing
(NLP)
Stanford CoreNLP
Part 2
Natural
Language
Processing
(NLP)
Stanford CoreNLP
DEMO
Term
Document
Matrix
Describes the frequency of terms that occur in a collection of documents
Term
Document
Matrix
Term frequency and weighting
TF-IDF weighting: give higher weight to terms that are
rare
Unsupervised
Learning
K-means Clustering
“Art of finding groups in data” – Kaufman, Rousseeuw
• No clear picture of what is within the document
•
• Natural pair of groupings
•
• Simple to run
K-means
Clustering
DEMO
Conclusion
1. Data Manipulation in R
2. Natural Language Processing
3. Machine Learning
4. Visualization
Text Analytics on Dataset
Thank you.

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Data Analytics using R with Yelp Dataset

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