Question
Hello everyone, I am new to MATLAB and I am currently plotting a normalised gyroscope data as in the picture below, and I am trying to count the number of the graph trying to go back to zero (on the word, number of the graph descending after reaching each peak). For example, if I calculate it manually fromthe graph, it's around 9 times it tries to go back to zero. But I am trying to do analysis on big data so I really ned way of finding it by MATLAB.
Expert Answer
Prashant Kumar
PhD Expert
Answered Aug 20, 2026
To find the troughs, invert the ‘y’ values and use findpeaks:
Example:
x = linspace(0,250,250); % Create Data y = 0.25*sin(0.25*pi*x) .* exp(-(x-125).^2./1000) + exp(-(x-125).^2./1000); [pks,plocs] = findpeaks(y); % Find peaks [trs,tlocs] = findpeaks(0.1+max(y) - y); % Find troughs figure(1) plot(x, y) hold on plot(x(plocs), y(plocs), '^r', 'MarkerFaceColor','r') % Plot peaks plot(x(tlocs), y(tlocs), 'vg', 'MarkerFaceColor','g') % Plot troughs hold off grid
produces:
100% Run Guarantee
3-Hour Fast-Track Delivery
Need a Custom Version or Complete Simulation for This Problem?
Our 500+ PhD engineers build, debug, and optimize working MATLAB scripts and Simulink (.slx) models tailored to your exact assignment rubrics with zero plagiarism.
Tested on MATLAB R2024b / R2026a
Turnitin 0% Plagiarism Report
Free 7-Day Revisions Guarantee
Have a different question? Ask here
Related matlab Questions & Solutions
Browse All →
Explore similar technical troubleshooting questions and verified MATLAB solutions:
Ready-to-Run MATLAB & Simulink Projects
Browse All Projects →