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Category Archives: unsupervised learning

Simple LDA Topic Modeling in Python: implementation and visualization, without delve into the Math

The very simple approach to train a topic model in LDA

within 10 minutes!

Plot words importance

topic modeling, topic modeling python lda visualization gensim pyldavis nltk

data cleasing, Python, text mining, topic modeling, unsupervised learning

Posted on April 25, 2017

What do people say about iphone? LDA topic models built by amazon phone purchased views

Built topic models from the data Amazon Reviews: Unlocked Mobile Phones,

Positive : Here’s 5 star ratings say, 20 topics version

Continue Reading →

Posted on April 15, 2017

unsupervised learning-4 discovering interpretable features

Non-negative matrix factorization (NMF)

word-frequency array

apply dimensional reduction techniques on image

PCA
NMF
SVD

NMF components, PCA components

Cosine similarity

learning, longly, midnight, super

data cleasing, jupyter notebook, project, Python, text mining, unsupervised learning

Posted on February 20, 2017

unsupervised learning-3 Dimension reduction: PCA, tf-idf, sparse matrix, twitter posts clustering Intrinsic dimension, text mining, Word frequency arrays, csr_matrix, TruncatedSVD

Dimension reduction: PCA, Intrinsic dimension

tf-idf, Word frequency arrays

sparse matrix, csr_matrix, TruncatedSVD

fun, pca, text mining, tf-idf

data cleasing, jupyter notebook, Python, statistic, text mining, unsupervised learning

Posted on February 18, 2017

unsupervised learning-2 Visualizing hierarchies

A hierarchy of groups

The dendrogram of a hierarchical clustering

Hierarchical clustering with SciPy

Distance between clusters

Extracting cluster labels

t-SNE for 2-dimensional maps

fun, graphs, learning

jupyter notebook, Python, unsupervised learning, vitualization

Posted on February 17, 2017

unsupervised learning -1 k-means clustering, Cross tabulation, Inertia, PCA, StandardScaler, Pipline

k-means clustering,

Cross tabulation,

Inertia,

PCA,

StandardScaler,

Pipline

fun, learning, Machine Learning

data cleasing, jupyter notebook, Python, unsupervised learning

Posted on February 16, 2017

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