How to detect a peak from a graph

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Ede gerlderlands
Ede gerlderlands 2013-4-3
回答： Chinnaiah Golla 2014-11-5
A part of my work need me to peak the peak from a graph of cyclic nature with time vs velocity. I tried to use treshold and and others options. to locate the maximum peak but could also include the local maximums . Is there anyway of picking the maximum value? such as sliding window ?

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-4-3
Use findpeaks function
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Ede gerlderlands
Ede gerlderlands 2013-4-3
I did use that and it also includes the local maximums which are not my needs.
Image Analyst
Image Analyst 2013-4-4
编辑：Image Analyst 2013-4-4
But you accepted this answer?

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更多回答（3 个）

Image Analyst
Image Analyst 2013-4-3
For local peaks I'd use findpeaks() in the Signal Processing Toolbox, or imregionalmax() in the Image Processing Toolbox. For a global peak, simply use the max function
[maxValue, indexOfMax] = max(yourSignal);
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Ede gerlderlands
Ede gerlderlands 2013-4-4
Ok thank you I have already done it with your above answer
Image Analyst
Image Analyst 2013-4-4
You're welcome. Glad I could help.

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pramod kumar
pramod kumar 2013-4-4
even i am also working on to find the peak of the signal i have tried inbuilt function [peak_value, peak_location] = findpeaks(Tx1Rx_1100mm_3plates);
  1 个评论
Image Analyst
Image Analyst 2013-4-4
After reading this: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer, post your own question, along with screenshot of your signal, and code (including data) that we can copy and paste to reproduce your situation.

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Chinnaiah Golla
Chinnaiah Golla 2014-11-5
If you simply want to obtain the maximum(Peak) value of signal by excluding the local maximas, you can use the max function.
max_val=max(signal);

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