how to find peaks value using specific time interval instead of indices ?

i am loging data from scope to workspace

i have to find peaksvalue for a specific time interval, lets say 12 to 12.5 sec but problem is that i have to mention time indices instead of time interval in command

such as

b=(findpeaks(ScopeData2.signals.values(378343:382177)))

i dont want to use these indices 378343:382177, i want to use time interval 12 to 12.5

reason for not using indices is that different scenarios such as ( capacitor case or motor case ) in my model have different number of indices for this specific time interval

to 12.5 sec

is there any way to use time 12 to 12.5 seconds to find peaks instead of indices ??

Answer 1

[Star Strider]

Try this:

t = linspace(0, 30, 1000);                              % Time Vector
y = sin(2*pi*t);                                        % Signal
t_int = [12, 12.5];                                     % Time Interval
idx = find((t >= t_int(1)) & (t <= t_int(2)));          % Indices Correspoinding To Time Interval

[pks,locs] = findpeaks(y(idx));                         % Find Peaks In Time Imterval
adjlocs = locs + idx(1)-1;                              % Adjust ‘locs’ To Correct For Offset

figure
plot(t, y)
hold on
plot(t(adjlocs), pks, '^r')
hold off
grid

Experiment to get the result you want.

[zubair younas]

thank u very much, its working very well

[Star Strider]

As always, my pleasure.

[GULZAR]

More than two interval means. What is the procedure of this code.