Finding position of main peak and difference between main peak and next peak in a 1d plot

How to find the position of main peak in a 1 d plot

Then how to find the value of the difference between the main peak and the next peak in the same plot.

Answer 1

[Star Strider]

x = linspace(0,10);
y = 1.5*exp(-(x-2).^2) + 2*exp(-(x-7).^2*2.5) + exp(-(x-9).^2*5);

[pks,locs] = findpeaks(y)

pks = 1×3

1.4994 1.9954 0.9996

locs = 1×3

21 70 90

[maxpk,idx] = max(y)

maxpk = 1.9954

idx = 70

figure
plot(x, y)
hold on
plot(x(locs), pks, '^r')
hold off

Result = table(pks(:),locs(:),(locs(:)-idx),(x(locs(:))-x(idx)).', 'VariableNames',{'Peaks','Indices','Index_Difference','X_Difference'})

Result = 3×4 table
     Peaks     Indices    Index_Difference    X_Difference
    _______    _______    ________________    ____________

     1.4994      21             -49             -4.9495   
     1.9954      70               0                   0   
    0.99959      90              20              2.0202   

.

[Vinay Killamsetty]

Thank you very much

[Star Strider]

As always, my pleasure!