How to smooth the data using the MATLAB?
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Hi
I was trying to smaooth the data using smooth function but not able to manage. can some experties help me. the data is attached here.
Thank you in advance!
采纳的回答
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1026350/data.txt');
x = T.Var2 ;
y = T.Var1 ;
yy = smooth(x,y,20) ;
plot(x,y,'r',x,yy,'b')
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Image Analyst
2022-6-9
Here are some options. Median filter medfilt1 and Savitzky Golay filter sgolayfilt. Adjust window widths as desired.
data = readmatrix('data1.txt')
x = data(:, 2);
y = data(:, 1);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
xlabel('x', 'FontSize', 20);
ylabel('y', 'FontSize', 20);
% Smooth the data
smoothedMedian = medfilt1(y, 79);
hold on;
plot(x, smoothedMedian, 'g-', 'LineWidth', 4);
smoothedSG = sgolayfilt(y, 2, 201);
hold on;
plot(x, smoothedSG, 'r-', 'LineWidth', 3);
legend('Original', 'Median', 'Savitzky-Golay')
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