Interpolating random values to smoothen a curve

I need to smoothen curve on this graph and remove the noise in it.I can either use interpolation or curve fitting. I am not able to do it using curve fitting toolbox.How can I do it..??

[KALYAN ACHARJYA]

Please do share the code. so that members can try on it.

Answer 1

[TADA]

you can implement the stavisky golay filter

basically the idea is to iterate through the data and on each point perform a polynomial fit on a window of several data points arround it, then each point is reoplaced with the value of the polynomial fit in that same point.

[Abhiraj Gupta]

Thank you !

order=1;

framelen =3;

for i=1:100

if(i==1)

y = sgolayfilt(data,order,framelen);

else

y = sgolayfilt(y,order,framelen);

end

end

this is giving perfect and smooth curve

[TADA]

In that code you apply the smoothing 100 times on the entire data

This is very intense and it will probably damage your signal

I would apply the smoothing once, but I would use a larger frame

I would also use a higher order fit