0.4. Data modeling

This section overviews all the scripts in the Chapter 4: Data modeling folder.

Definitions

Term	Definition
features	descriptive numerical representations to describe an object.
machine learning	the process of teaching a machine something that is useful.
classification model	If the goal is to separate out into classes (e.g. male or female), then this is known as a classification problem.
regression model	if the end goal is to measure some correlation with a variable and the output is more a numerical range (e.g. often between 0 and 1), then this is more of a regression problem.
deep learning models	models that are trained using a neural network.
unsupervised learning	if machines do not require labels (e.g. just need features), this is known as a unsupervised learning problem.
supervised learning	if machines require labels (e.g. male or female as separate feature arrays), this is known as a supervised learning problem.
training set	Machines are fed training data in the form of feature arrays and compress patterns in these feature arrays into models through algorithms.
testing set	data that is left out during training so that the accuracy can be calculated using cross-validation techniques.
validation set	data that is left out during training to tune hyperparameters (often used in deep learning modeling.
label	a tag of an featurized audio sample (e.g. male or female) to aid in supervised learning.
cross-validation	how the performance of ML models are assessed (in terms of accuracy).

4.2 - Obtaining training data

make_playlist.py (from CLI)

cd ~
cd voicebook/chapter_4_modeling/youtube_scrape
python3 make_playlist.py 
what is the name of this playlist?
what is the playlist id or URL?
… [‘n’ to stop making playlist]

download_playlist.py (from CLI)

python3 download_playlist.py 
what is the name of the playlist to download?
… downloads playlist to /playlist folder 

4.3 - Labeling training data

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4.4 - Classification models

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4.5 - Regression models

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4.6 - Deep learning models

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4.7 - AutoML approaches

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