central_diff.m

Version 2.0.0.0 (4.12 KB) by Robert Canfield
Calculates numeric gradient using second-order difference formula for unevenly spaced data
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Updated 1 Oct 2015

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The central_diff function calculates a numeric gradient using second-order accurate difference formula for evenly or unevenly spaced coordinate data. It operates in a similar fashion to the MATLAB function, gradient, except that it permits only one independent variable, x, and correctly handles unevenly spaced values of the x-coordinate data. Accuracy is increased at the ends relative to the MATLAB gradient function, which uses only first-order forward or backward differences at the ends, by instead using second-order forward difference at the left end and second-order backward difference at the right end.

Cite As

Robert Canfield (2024). central_diff.m (https://www.mathworks.com/matlabcentral/fileexchange/12-central_diff-m), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2015b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Acknowledgements

Inspired: central_diff2(y,deltat,d,a), DGradient

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Version Published Release Notes
2.0.0.0

Second-order accurate forward and backward difference formulae are used now at the left and right ends, instead of first-order forward/backward differences at the ends. Logical operators & and | were replaced with && and ||, respectively.
1.0.0.0