Hello everyone 🙂
I created individual ECG waves (P wave, QRS complex, and T wave, which is identical to the P wave) using symbolic variables and the Fourier series. However, I am struggling to merge these waves into a single waveform—it jumps around unpredictably, and I generally don’t know how to proceed. 🙁

my code is here:
close all;clear all; clc;
%P wave (T wave)
T = 1
f = 1/T
omega = 2*pi*f
syms t k
c=0
a_0 = (1/pi) * int((-t^2), t, c, c + 1);
a_n = (1/pi)*int(-t^2 * cos(k*t),t,c,c+1);
b_n = 0;
FS_P = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1)
FS_P = 4*FS_P
four = subs(FS_P)
%number of repetitions
N = 1
ezplot(four,0:6.3*N)
grid on
%QRS complex – first part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(t*sin(k*t),x,c,c+2*pi)
FS_QRS = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRS = 2*FS_QRS
four = subs(FS_QRS)
N=4
ezplot(four)
%QRS complex – second part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(-t*sin(k*t),x,c,c+2*pi)
FS_QRs = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRs = -2*FS_QRs
four = subs(FS_QRs)
ezplot(four)

I try to simply add these signals but it doesnt work :(Hello everyone 🙂
I created individual ECG waves (P wave, QRS complex, and T wave, which is identical to the P wave) using symbolic variables and the Fourier series. However, I am struggling to merge these waves into a single waveform—it jumps around unpredictably, and I generally don’t know how to proceed. 🙁

my code is here:
close all;clear all; clc;
%P wave (T wave)
T = 1
f = 1/T
omega = 2*pi*f
syms t k
c=0
a_0 = (1/pi) * int((-t^2), t, c, c + 1);
a_n = (1/pi)*int(-t^2 * cos(k*t),t,c,c+1);
b_n = 0;
FS_P = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1)
FS_P = 4*FS_P
four = subs(FS_P)
%number of repetitions
N = 1
ezplot(four,0:6.3*N)
grid on
%QRS complex – first part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(t*sin(k*t),x,c,c+2*pi)
FS_QRS = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRS = 2*FS_QRS
four = subs(FS_QRS)
N=4
ezplot(four)
%QRS complex – second part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(-t*sin(k*t),x,c,c+2*pi)
FS_QRs = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRs = -2*FS_QRs
four = subs(FS_QRs)
ezplot(four)

I try to simply add these signals but it doesnt work 🙁 Hello everyone 🙂
I created individual ECG waves (P wave, QRS complex, and T wave, which is identical to the P wave) using symbolic variables and the Fourier series. However, I am struggling to merge these waves into a single waveform—it jumps around unpredictably, and I generally don’t know how to proceed. 🙁

my code is here:
close all;clear all; clc;
%P wave (T wave)
T = 1
f = 1/T
omega = 2*pi*f
syms t k
c=0
a_0 = (1/pi) * int((-t^2), t, c, c + 1);
a_n = (1/pi)*int(-t^2 * cos(k*t),t,c,c+1);
b_n = 0;
FS_P = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1)
FS_P = 4*FS_P
four = subs(FS_P)
%number of repetitions
N = 1
ezplot(four,0:6.3*N)
grid on
%QRS complex – first part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(t*sin(k*t),x,c,c+2*pi)
FS_QRS = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRS = 2*FS_QRS
four = subs(FS_QRS)
N=4
ezplot(four)
%QRS complex – second part
syms t k x
c=0
a_0 = 0
a_n = 0
b_n = 1/pi * int(-t*sin(k*t),x,c,c+2*pi)
FS_QRs = a_0/2 + symsum(a_n*cos(k*t)+b_n*sin(k*t),k,1,1000)
FS_QRs = -2*FS_QRs
four = subs(FS_QRs)
ezplot(four)

I try to simply add these signals but it doesnt work 🙁 signal processing, symbolic MATLAB Answers — New Questions

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