How to smooth and normalize noisy data

I plotted sumrate against number of iterations but my data is very noisy. I need a smooth PDF, how can I smooth and normalize the attached noisy data. Thanks.

[Chunru]

doc smoothdata

[Felix Obite]

i need to improve on this, have tried several smoothing function.

Answer 1

[Star Strider]

I have no idea what result you want.

One option is the filloutliers function (or similar functions) and another is the Signal Processing Toolbox sgolayfilt function to do broadband filtering.

[Felix Obite]

hi, i tried sgolayfilt function, but got error message. so I used the following function:

pro_position = [451 461 913 271];

smooth_rate = 0.01; % other pdfs with less smoothing

h = figure;

h.Position = pro_position;

plot(i,smooth(x, smooth_rate))

And this is the best I could get. I need to improve the convergence plot.

[Star Strider]

It would be interesting to see your sgolayfilt call. I usually use a degree 3 polynomial, begin with a frame length that is about 5% of the length of the vector, and then adjust the framelength until I get the result I want.

There are several smooth functions. I have no idea which one you are referring to.

Answer 2

[KALYAN ACHARJYA]

Please check the smoothdata Matlab function

https://in.mathworks.com/help/matlab/ref/smoothdata.html

it can smooth the data in number of ways, note that the trade-off between the actual data points and the averaged data points should be within the acceptable level.

[Felix Obite]

Many thanks