*Non-negative matrix factorization (NMF)*

*word-frequency array*

*apply dimensional reduction techniques on image*

*NMF components, PCA components*

*Cosine similarity*

*SQLAlchemy connecting to PostgreSQL, *

*filtering, *

*grouping, aggregating funcs *

*To Pandas DataFrame *

*and plotting with matplotlib and seaborn*

*Dimension reduction: PCA, Intrinsic dimension*

*tf-idf, Word frequency arrays*

*sparse matrix, csr_matrix, TruncatedSVD*

*visualizing regressions*

*group by categorical feature*

*plot Residuals*

*Higher-order regressions*

*Visualizing univariate distributions*

*Visualizing multivariate distributions*

### A hierarchy of groups

### The dendrogram of a hierarchical clustering

*Hierarchical clustering with SciPy*

*Distance between clusters*

*t-SNE for 2-dimensional maps*

*create engine*

*connect*

*queries*

*SQLAlchemy*

*k-means clustering, *

*Cross tabulation, *

*Inertia, *

*PCA,*

* StandardScaler,*

* Pipline*

*matplotlib*

*seaborn*

*3d scatterplot*

*jointplot*

*FacetGrid*

*boxplot*

*stripplot*

*violinplot*

*kdeplot*

*pairplot*

*Andrews Curves*

*parallel_coordinates*

*radviz*

*grouping*

*filtering*

*visualizing*