Adjust samples in one signal after move a second signal in the time (x) axis

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José Santos Pérez Leal 2021-7-20

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https://ww2.mathworks.cn/matlabcentral/answers/882658-adjust-samples-in-one-signal-after-move-a-second-signal-in-the-time-x-axis

编辑： José Santos Pérez Leal 2021-7-20

在 MATLAB Online 中打开

Hi, everyone.

I'm plotting two signals, as can be seen in the next image:

The time and voltage are 2 different arrays that are plotted for each signal. The 2 arrays for the blue signal are attached to this description and are time5a14_S1R1_TAI and SM_TAI_S1R1_5A14. The 2 arrays for the red signal are attached to this description and are time5a14_S1R1_TAD and SM_TAD_S1R1_5A14. My code for this plot is the next one:

load('time5a14_S1R1_TAI')
load('time5a14_S1R1_TAD')
load('SM_TAI_S1R1_5A14')
load('SM_TAD_S1R1_5A14')
lim5=5;
lim14=14;
figure %Graficar en una figura diferente
plot(time5a14_S1R1_TAI,SM_TAI_S1R1_5A14,'b','linewidth',2) %Graficar señal filtrada contra el tiempo
hold on
plot(time5a14_S1R1_TAD,SM_TAD_S1R1_5A14,'r','linewidth',2) %Graficar señal filtrada contra el tiempo
hold off
grid on
legend('Tibial Anterior Izquierdo (Envolvente)','Tibial Anterior Derecho (Envolvente)')
xlabel('Tiempo (seg)')
ylabel('Voltaje (mV)')
title('Datos de EMG filtrados - Sensor Tibial Anterior Derecho e Izquierdo (S1R1)')
xlim([lim5 lim14]) %Graficar en cierto límite del tiempo

I need to move the red signal to the left, as can be seen in the next image:

My code for this plot is similar to the first one, and is this:

lim5=5;
lim14=14;
figure %Graficar en una figura diferente
plot(time5a14_S1R1_TAI,SM_TAI_S1R1_5A14,'b','linewidth',2) %Graficar señal filtrada contra el tiempo
hold on
plot(time5a14_S1R1_TAD(1:end-673),SM_TAD_S1R1_5A14(674:end),'r','linewidth',2) %Graficar señal filtrada contra el tiempo
hold off
grid on
legend('Tibial Anterior Izquierdo (Envolvente)','Tibial Anterior Derecho (Envolvente)')
xlabel('Tiempo (seg)')
ylabel('Voltaje (mV)')
title('Datos de EMG filtrados - Sensor Tibial Anterior Derecho e Izquierdo (S1R1)')
xlim([lim5 lim14]) %Graficar en cierto límite del tiempo

My problem is that I need to adjust the samples from the blue signal, because I already did a manipulation in the red one to be plotted from different points in the array. But I don't know how to do it and I can't find didactit information about this kind of adjust of samples in MATLAB.

If someone can help me I would be really grateful.

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José Santos Pérez Leal 2021-7-20

编辑：José Santos Pérez Leal 2021-7-20

在 MATLAB Online 中打开

I think I already solve this problem. What I need is to obtain all the arrays in the second plot to be with the same length, and I solve it by doing the next code, in case it helps someone:

load('SM_TAI_S1R1_5A14')
load('time5a14_S1R1_TAI')
SM_MO=SM_TAI_S1R1_5A14(1:end-673);
time5a14_S1R1_TAI_MO=time5a14_S1R1_TAI(1:end-673);
plot(time5a14_S1R1_TAI_MO,SM_MO)
load('SM_TAD_S1R1_5A14')
load('time5a14_S1R1_TAD')
SM_MO2=SM_TAD_S1R1_5A14(674:end);
time5a14_S1R1_TAD_MO2=time5a14_S1R1_TAD(1:end-673);
plot(time5a14_S1R1_TAD_MO2,SM_MO2)
figure
plot(time5a14_S1R1_TAI_MO,SM_MO,'b')
hold on
plot(time5a14_S1R1_TAD_MO2,SM_MO2,'r')