find_idx

Fractional binning
2.1K Downloads
Updated Wed, 09 Jun 2021 06:07:06 +0000

View License

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 (https://www.mathworks.com/matlabcentral/fileexchange/23049-find_idx), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2008b
Compatible with any release
Platform Compatibility
Windows macOS Linux
Categories
Find more on Interpolation in Help Center and MATLAB Answers

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Version Published Release Notes
1.1.0.2

Remove mex file as request by TMW

1.1.0.0

Correct tags

1.0.0.0