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anyExceed

version 1.1.0.0 (10.2 KB) by Jan
Fast test for out of range elements, C-mex

6 Downloads

Updated 01 Nov 2011

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Check if any element of an array exceeds an upper or lower limit

Equivalent Matlab expression:
any(Array(:) < Lower) || any(Array(:) > Upper)
This Mex is 50% to 80% faster in the worst case (see screenshot):
1. It does not create temporary arrays.
2. It returns fast after the first exceeding element without processing the rest.
3. Infinite values can be ignored and the absolute values of the elements can be computed on the fly whithout the need of temporary arrays.

Flag = anyExceed(Array, Lower, Upper, Options...)
INPUT:
Array: Array of any size. Accepted classes: DOUBLE, SINGLE, (U)INT8/16/32/64, CHAR.
Lower, Upper: Scalar limits.
Options: Optional strings to control the comparison. The options can be combined:
'finite': +-Inf values in [Array] are ignored.
'absolute': Compare absolute values.
'exclude': Exclusive limits:
Flag = any(Array(:) <= Lower) || any(Array(:) >= Upper)

OUTPUT:
Flag: TRUE if any element exceeds the limits, FALSE otherwise.

EXAMPLES:
anyExceed(rand(1000), 0, 1) % FALSE
anyExceed(0:0.1:1, 0, 1, 'exclude') % TRUE
anyExceed([1, Inf, 2], 0, 2, 'finite') % FALSE
anyExceed(-10:10, 0, 10, 'abs') % FALSE
anyExceed(-10:10, -1, 10, 'abs', 'ex') % TRUE

COMPILE:
Windows: mex -O anyExceed.c
Linux: mex -O CFLAGS="\$CFLAGS -std=C99" anyExceed.c
Precompiled Mex: http://www.n-simon.de/mex
See anyExceed.c for more information.
Run uTest_anyExceed for a selftest.

Tested: Matlab 6.5, 2008a/b, 2009a, 2001b, 32/64 bit, WinXP, Win 7
LCC, BCC, OWC, MSVC 2008 and 2010
Assumed compatibility: Linux, OS-X

Comments and suggestions by email or as comments are appreciated.

Cite As

Jan (2021). anyExceed (https://www.mathworks.com/matlabcentral/fileexchange/27857-anyexceed), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (2)

Khoa Sdyn

Thanks you so much! It works great

MATLAB Release Compatibility
Created with R2009a
Compatible with any release
Platform Compatibility
Windows macOS Linux
Acknowledgements

Inspired: csearch

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