Stract error line 91 and not recognizing the variable

I have the script below to get the figures of the amplitudes but I got many errors as mentioned in the title when importing the data from text file:

close all;clear;clc;

% Data_Chan1.txt --- x-dirention displacement signal

% Data_Chan2.txt --- y-dirention displacement signal

% Data_Chan3.txt --- y-acceleration signal

% Data_Chan4.txt --- z-acceleration signal

% modify the path to the file to be analysed

path = 'rub-impact/group1/900rpm/Throughput/Data_Chan1.txt');

time=DataChan1(:,1); % time sequency

x=DataChan1(:,2); % displacement signal sequency (x, y, or keyphasor, here is x)

fs=10240; % samling freuency

% plot time waveform

figure

plot(t,x)

% plot spectrum

figure

plotfft(x,fs,'b')

% modify the path to the file to be analysed

path_2=load('rub-impact/group1/900rpm/Throughput/Data_Chan2.txt');

data=path(2:end,1:2);

t=data(:,1); % time sequency

y=data(:,2); % displacement signal sequency (x, y, or keyphasor, here is y)

% plot time waveform

figure

plot(t,y)

% plot spectrum

figure

plotfft(y,fs,'b')

% modify the path to the file to be analysed

path_3=load('rub-impact/group1/900rpm/Throughput/Data_Chan3.txt');

data=path_3(2:end,1:2);

t=data(:,1); % time sequency

y=data(:,2); % displacement signal sequency (x, y, or keyphasor, here is y)

% plot time waveform

figure

plot(t,y)

% plot spectrum

figure

plotfft(y,fs,'b')

% modify the path to the file to be analysed

path_4=load('rub-impact/group1/900rpm/Throughput/Data_Chan4.txt');

data=path_4(2:end,1:2);

t=data(:,1); % time sequency

z=data(:,2); % displacement signal sequency (x, y, z or keyphasor, here is z)

% plot time waveform

figure

plot(t,z)

% plot spectrum

figure

plotfft(z,fs,'b')

% plot keyphasor signal

path=load('rub-impact/group1/900rpm/Throughput/Data_Chan1.txt');

keyphasor=path(:,2); % displacement signal sequency (x, y, or keyphasor, here is keyphasor)

figure

plot(t,keyphasor)

% plot the orbit

path=load('rub-impact/group1/900rpm/Throughput/Data_Chan2.txt');

y=data(:,2); % displacement signal sequency (x, y, or keyphasor, here is y)

figure

plot(x,y)

in the script input1 used the codes below:

DataChan12 = importDataChanfile('Data_Chan12.txt');

size(DataChan12)

data=DataChan12(2:end,1:2);

size(data)

Thanks

Answer 1

[Voss]

Is something like this what you're trying to do?

DataChan1 = importDataChanfile('Data_Chan1.txt');
t=DataChan1{:,1}; % time sequency
x=DataChan1{:,2}; % displacement signal sequency (x, y, or keyphasor, here is x)
fs=10240;    % samling freuency
% plot time waveform
figure
plot(t,x)

% plot spectrum
figure
plotfft(x,fs,'b')

% modify the path to the file to be analysed
data = importDataChanfile('Data_Chan2.txt');
t=data{:,1}; % time sequency
y=data{:,2}; % displacement signal sequency (x, y, or keyphasor, here is y)
% plot time waveform
figure
plot(t,y)

% plot spectrum
figure
plotfft(y,fs,'b')

% modify the path to the file to be analysed
data = importDataChanfile('Data_Chan3.txt');
t=data{:,1}; % time sequency
y=data{:,2}; % displacement signal sequency (x, y, or keyphasor, here is y)
% plot time waveform
figure
plot(t,y)

% plot spectrum
figure
plotfft(y,fs,'b');

% modify the path to the file to be analysed
data = importDataChanfile('Data_Chan4.txt');
t=data{:,1}; % time sequency
z=data{:,2}; % displacement signal sequency (x, y, z or keyphasor, here is z)
% plot time waveform
figure
plot(t,z)

% plot spectrum
figure
plotfft(z,fs,'b')

% % plot keyphasor signal
% path=load('rub-impact/group1/900rpm/Throughput/Data_Chan1.txt'); 
% keyphasor=path(:,2); % displacement signal sequency (x, y, or keyphasor, here is keyphasor)
% figure
% plot(t,keyphasor)
% % plot the orbit
% path=load('rub-impact/group1/900rpm/Throughput/Data_Chan2.txt');
% y=data(:,2); % displacement signal sequency (x, y, or keyphasor, here is y)
% figure
% plot(x,y)

[Ali Agha]

Exactly Benjamin, thank you so much for this great support. I will try it to run the below also

% % plot keyphasor signal

% path=load('rub-impact/group1/900rpm/Throughput/Data_Chan1.txt');

% keyphasor=path(:,2); % displacement signal sequency (x, y, or keyphasor, here is keyphasor)

% figure

% plot(t,keyphasor)

% % plot the orbit

% path=load('rub-impact/group1/900rpm/Throughput/Data_Chan2.txt');

% y=data(:,2); % displacement signal sequency (x, y, or keyphasor, here is y)

% figure

% plot(x,y)

the main issue was about the import the files

Answer 2

[Ali Agha]

All done. Thank you so much!

[Voss]

Excellent! You're welcome