Interactive resolution enhancement function

Slider-controlled resolution enhancement, written as a single self-contained Matlab function.

Description

function ire(x, signal)
Interactive resolution enhancement function for data in the arguments "x,signal". Displays sliders for real-time control of 2nd and 4th derivative weighting factors (factor and factor2) and smooth width. (Larger values of factor1 and factor2 will reduce the peak width but will cause artifacts in the baseline near the peak. Adjust the factors for the the best compromise.) Use the minimum smooth width needed to reduce excess noise. You can adjust the slider ranges in lines 33-35.
Declares global variables IREDATA and IREPARAMETERS. Filtered signal is returned in IREDATA(3,:,:), so declare IREDATA as global before calling ire.m to have access to IREDATA outside of ire.m
Tom O'Haver ([e-mail]), June 2008. Slider function by matthew jones ([e-mail]), 2004

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
Interactive Resolution Enhancement

• MATLAB release: MATLAB 6.5 (R13)

[Tom O'Haver]

The sliders used in this program do not work in recent version of Matlab. I've now uploaded a new keypress-operated version that performs interactive smoothing, derivatives, and peak sharpening. See http://www.mathworks.com/matlabcentral/fileexchange/32075-isignal