Alex daSilva – Medium

Alex daSilva

Alex daSilva
in
Towards Data Science

Feature selection by filtering: what could go wrong? (Spoiler: A lot)

An illustration of how to correctly (and incorrectly) perform feature selection by univariate filtering

5 min readNov 20, 2019

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Feature selection by filtering: what could go wrong? (Spoiler: A lot)

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1

Alex daSilva
in
Towards Data Science

R vs Python: Comparing Data Science Job Postings Seeking R or Python specialists

What are employers looking for when making language targeted data science job ads?

8 min readOct 4, 2019

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R vs Python: Comparing Data Science Job Postings Seeking R or Python specialists

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Alex daSilva
in
Towards Data Science

XᵀX, Covariance, Correlation and Cosine matrices:

A walk through for calculating several popular association matrices

2 min readAug 9, 2019

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XᵀX, Covariance, Correlation and Cosine matrices:

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Alex daSilva
in
Towards Data Science

Keeping an eye on confounds: a walk through for calculating a partial correlation matrix

An R demo illustrating two approaches for calculating partial correlation matrices

4 min readJul 26, 2019

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Keeping an eye on confounds: a walk through for calculating a partial correlation matrix

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Alex daSilva
in
Towards Data Science

How to create a simple statistical learning model from scratch: emphasizing prediction in…

What’s happening under the hood of lm? An R tutorial unpacking estimation, prediction, and validation for linear regression

4 min readJul 17, 2019

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How to create a simple statistical learning model from scratch: emphasizing prediction in…

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Alex daSilva

Alex daSilva

Social Science and Data Science Nerd | PhD Candidate in Psychological and Brain Sciences at Dartmouth College | https://www.linkedin.com/in/alex-w-dasil/

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