How do I filter my data points without using smoothdata?
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I have 2 variables, t and y, which are both vectors. What I want to do is smooth the data so that, for example, if t is a 10x1 vector, it becomes a 5x1 vector comprising an average of the data points around it. How do I go about this without using the smoothdata function?
Thank you very much and kind regards,
Tom
2 Commenti
Bob Thompson
il 11 Dic 2018
I'm sure there's a better way, but you could do this manually using a for loop and interpolation.
t2 = linspace(t(1),t(end),5);
for i = 1:5;
y2(i) = interp1(t,y,t2(i));
end
Chad Greene
il 11 Dic 2018
Note: Interpolation without smoothing or lowpass filtering first could result in aliasing.
Risposte (2)
Chad Greene
il 11 Dic 2018
2 Commenti
Image Analyst
il 12 Dic 2018
No, it's part of base MATLAB. If you get help on any function, it will tell you what toolbox it's in, if any.
Image Analyst
il 12 Dic 2018
Modificato: Image Analyst
il 12 Dic 2018
You could use conv() to smooth y.
windowWidth = 5;
kernel = ones(1, windowWidth) / windowWidth;
smoothedY = conv(y, kernel, 'valid'); % conv() is in base MATLAB.
Do NOT smooth t, for obvious reasons.
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