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sbabayan committed Apr 4, 2019
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### Principal Component Analysis (PCA)

[Principal component analysis](https://en.wikipedia.org/wiki/Principal_component_analysis)
is a statistical technique which extracts new, linearly uncorrelated, variables out of a
dataset which capture the maximum variance in the data. In this way, `PCA` can
be used to reduce the number of variables in a high dimensional dataset, a
process that is called dimensionality reduction. The first principal component
captures the largest amount of variance, while the second captures the largest
portion of the remaining variance while remaining orthogonal to the first and
so on. This allows the reduction of the number of dimensions while maintaining
as much of the information from the original data as possible. `PCA` is useful
in exploratory data analysis because complex relationships can be visualized
is a statistical technique which extracts new, linearly uncorrelated,
variables out of a dataset which capture the maximum variance in the
data. In this way, `PCA` can be used to reduce the number of variables
in a high dimensional dataset, a process that is called dimensionality
reduction. The first principal component captures the largest amount of
variance, while the second captures the largest portion of the remaining
variance while remaining orthogonal to the first and so on. This allows the
reduction of the number of dimensions while maintaining as much of the
information from the original data as possible. `PCA` is useful in
exploratory data analysis because complex relationships can be visualized
in a 2D scatter plot of the first few principal components.

TabPy’s implementation of `PCA` uses the scikit-learn
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