Fractional binning
Updated 9 Jun 2021

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idx=find_idx(xi, xgrid)
This function not only bin similarly to HISTC, but also returns the fractional position of data points within the binning interval.
It is equivalent to
interp1(xgrid,(1:length(xgrid)), xi)
but with the speed improvement up to 5 times.
Algorithm: dichotomy, complexity of m.log(n), where m isnumber of data points (xi) and n is number of bins (xgrid).
Few obvious examples of applications:
- binning step for more sophisticated interpolation schemes such as multi-dimensional spline or linear tensorial interpolations.
- Generate discrete random sequences with given probability distribution.

Cite As

Bruno Luong (2024). find_idx (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2008b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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