How can I lower to 0 the base of a window signal?

L.E.: signal.*abs(signal)/max(abs(signal)) worked for me if anyone else comes across this issue

Hi! I have this signal, obtained by smoothing the absolute an ECG signal.

I need to create these windows. For that, I have to set the base to 0. Can anyone help me, please?

[Walter Roberson]

signal.*abs(signal)/max(abs(signal))

is not going to solve the problem you asked about. In the below, notice that your formula leaves negative values (instead of changing the base to zero), and your formula distorts values near 0.

x = linspace(0, 4);
signal1 = 10 * exp(-(x-1).^2*5) - 2;
signal2 = 7 * exp(-(x-3).^2*5) - 3;
signal = signal1 + signal2;
figure
plot(x, signal1, x, signal2, x, signal);
legend({'pulse1', 'pulse2', 'sum'});
title('original');

signal2 = signal.*abs(signal)/max(abs(signal));
figure
plot(x, signal2); title('scaled')

Answer 1

[Walter Roberson]

subtract min(signal) from signal

[Roxana Maria DRAGHICI]

Hello!

Thank you very much for the answer! I tried what you told me, but nothing happened, unfortunately. I tried (signal-min (signal)). Or did you mean something else?