I have a signal which is quite noisy, I want to remove the noise from the signal, I did the smoothing but the results are still not good. The file is attached below

I have a signal which is quite noisy, I want to remove the noise from the signal, I did the smoothing but the results are still not good. What is the best way to remove the noise. The file is attached below

The CODE is:

clear all

clc

%WITH HOLE UP:

anum1= xlsread('DSO0001.csv','A7138:A12438');

anum2=xlsread('DSO0001.csv','C7138:C12438');

anum3=smoothdata(anum2);

plot(anum1,anum3,'b')

title('Generator On Hole (Without Smoothing)')

set(gca,'Fontsize',20)

xlabel('Time (milli Second)')

ylabel('volatage (mV)')

Answer 1

[Chunru]

data= readmatrix("https://www.mathworks.com/matlabcentral/answers/uploaded_files/934649/DSO0001.CSV");
anum1 = data(:,1);
anum2 = data(:,3);

% Adjust the smooth methods and window size 
anum3=smoothdata(anum2, 1, 'sgolay', 100);

subplot(211); plot(anum1,anum3,'b')
title('Generator On Hole (With Smoothing)')
xlim([0.7 1.2]*1e4);

subplot(212); plot(anum1,anum2,'g')
xlim([0.7 1.2]*1e4);
title('Generator On Hole (Without Smoothing)')

xlabel('Time (milli Second)')
ylabel('volatage (mV)')