[RFC]: Canberra distance between two strided arrays

[Planeshifter]

Description

This RFC proposes adding a function to calculate the Canberra distance between two strided arrays.

Package: @stdlib/math/strided/distances/canberra

The function should have the following signature canberra( N, x, strideX, y, strideY ).

The Canberra distance is a measure of dissimilarity between two samples in a data set.

The Canberra distance between two elements is as follows:

(abs(x[i] - y[i]) / (abs(x[i]) + abs(y[i]))

See:

• SciPy
• compute-io

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Checklist

• [X] I have read and understood the Code of Conduct.
• [X] Searched for existing issues and pull requests.
• [X] The issue name begins with RFC:.