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Smoothed curve new x and y coordinates

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Antoine
Antoine 2023-2-22
评论： Corey Silva 2023-3-14
I have X and Y data on excel
I imported the table to matlab and plotted the curve and then smoothed it.
How can i get the new values of X and Y of the smoothed curve ?
Thank You
  2 个评论
Askic V
Askic V 2023-2-22
编辑：Askic V 2023-2-22
The question should be how to get smoothed Y values, because X values should stay the same.
Probably as an output from your smoothing function or whatever you applied on the Y data.
y_smooth = smooth(Y)
Akira Agata
Akira Agata 2023-2-22
I believe smoothdata function's help page will be some help.

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回答（1 个）

Naren
Naren 2023-3-1
Refer to the below code which possibly resolves your problem.
data = readtable('mydata.xlsx');
x = data.X; % Assuming the column with X data is named "X"
y = data.Y; % Assuming the column with Y data is named "Y"
% Smooth the curve using moving average
windowSize = 5;
smoothY = movmean(y,windowSize);
% You can plot the both and compare for better understanding
figure;
plot(x,y);
hold on;
plot(x,smoothY);
%export the smoothed data into a excel file
smoothData = table(x,smoothY) % table containing smoothed y values.
writetable(smoothData,'smoothed_data.xlsx');
This code assumes that your X and Y data are in separate columns in your Excel file named "mydata.xlsx". The code reads in the data using the readtable() function, and then extracts the X and Y data into separate variables, and then applies a moving average smoothing to the Y data using the movmean() function.
Finally, the smoothed data is saved to a new Excel file using the writetable() function. The new file will contain two columns, one for X and one for the smoothed Y values.
Refer the documentation below for further information.
Moving mean - MATLAB movmean (mathworks.com)
  1 个评论
Corey Silva
Corey Silva 2023-3-14
The smoothdata function will help you out here.
You can simply use the table as an input to this function.
>> smoothdata(t,"movmean") % smoothes the data contained in the table t with the "movmean" method

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