spikeRemoval

버전 2.1.0 (7.03 KB) 작성자: Dr. Erol Kalkan, P.E.

This function replace or delete unwanted spikes (outliers) exceeding the threshold value using histogram method.

팔로우

0.0

(0)

다운로드 수: 674

업데이트 날짜: 2019/3/20

라이선스 보기

DESPIKING DISCRETE-TIME SIGNAL USING HISTOGRAM METHOD

Time series may contain undesired transients and spikes. This function replace spikes (outliers) exceeding the threshold value by interpolating among previous and subsequent data points or replacement them with NaN per user choice. The threshold is defined as mean +/- a number of standard deviations of windowed data centered at spike locations. This code uses the histogram method of Solomon et al. (2001) to detect spikes.

Examples are given in the comment section. The debug option when it is "True" compares results of this function with MatLAB's 1-D median filtering (medianfilt1) function.

For questions, comments and suggestions: kalkan76@gmail.com

Reference:

Solomon, O. M., D. R. Larson, and N. G. Paulter (2001). Comparison of some algorithms to estimate the low and high state level of pulses, IEEE Instrumentation and Measurement Technology Conference, Vol. 1, Budapest, Hungary, 21–23 May 2001, 96–101.

인용 양식

Dr. Erol Kalkan, P.E. (2024). spikeRemoval (https://www.mathworks.com/matlabcentral/fileexchange/69614-spikeremoval), MATLAB Central File Exchange. 검색됨 2024/7/25.

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개발 환경: R2018b

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spikeRemoval

버전	게시됨	릴리스 정보
2.1.0	2019/3/20	Updated references	다운로드
2.0.9	2019/3/20	Replaced diff with nth order central difference function. Updated notes	다운로드
2.0.8	2018/12/28	Updated notes	다운로드
2.0.7	2018/12/28	Updated notes	다운로드
2.0.6	2018/12/28	Added return -1 if no spike found	다운로드
2.0.5	2018/12/28	Added output array for indices of spikes, their values and replacements (thanks to Dr. Ayal Anis) Added "delete" option to "method" to replace spikes (outliers) with "NaN" (thanks to Dr. Ayal Anis) Added nanmean and nanstd (thanks to Jan Glscher)	다운로드
2.0.4	2018/12/19	Comments are updated	다운로드
2.0.3	2018/12/19	Excluded spike in spike search window for mean and standard deviation computation; bug fix for spike search in the beginning and end regions of the input array.	다운로드
2.0.2	2018/12/12	Modified comments	다운로드
2.0.1	2018/12/11	Reference added, description updated	다운로드
2.0.0	2018/12/10	Code re-organized to eliminate the wrapper. "varargin" was added to give flexibility. All global variables were removed.	다운로드
1.0.0	2018/12/5		다운로드