Find the id of the closest value in an array to a given value

Returns the index of the closest value in an array X to given values Y
78 download
Aggiornato 14 set 2016

Visualizza la licenza

For given column vector X and some values Y, FINDCLOSESTID2VAL returns the indices in X which are closest to Y, e.g.: FINDCLOSESTID2VAL([0.1 -1 -0.05 10],0) will return 3, since -0.05 is the closest value to 0.
This function is very handy for time series, where you want to get the id of a time point which might not be exactly matched.
This function is very fast for small to moderate sized 'X' and small 'Vals'. For a function doing the same work quickly on two very large arrays and with some additional features see NEARESTPOINT by Jos:
The figure on the upper left shows the max. length of 'Vals' versus the length of 'X' for which FINDCLOSESTID2VAL (f1) will be faster than NEARESTPOINT (f2) including the equation to compute the critical value for arbitrary lengths of 'X'.

Cita come

David J. Mack (2024). Find the id of the closest value in an array to a given value (, MATLAB Central File Exchange. Recuperato .

Compatibilità della release di MATLAB
Creato con R2009a
Compatibile con qualsiasi release
Compatibilità della piattaforma
Windows macOS Linux
Scopri di più su Matrix Indexing in Help Center e MATLAB Answers

Ispirato da: nearestpoint(x, y, m)

Community Treasure Hunt

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

Start Hunting!
Versione Pubblicato Note della release

Added speed test for FINDCLOSESTID2VAL vs. NEARESTPOINT to the FEX description.