How to smooth the data using the MATLAB?

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Somnath Kale
Somnath Kale 2022-6-9
评论： Somnath Kale 2022-6-9
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!

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采纳的回答

KSSV
KSSV 2022-6-9
Ran in:
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')

更多回答（1 个）

Image Analyst
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')
  1 个评论
Somnath Kale
Somnath Kale 2022-6-9
@Image Analyst Thank You for you little advance smoothing functions information! I will look to that as well.

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