how to calculate anomaly ?

Hi all,

I want to extract data based on the months using this function 'monthofyear' to calculate anomalies.

The written code shows the wrong results.

Any help is appreciated

anom=[];
i=1;

for yy = 2019
    ndays = eomday(yy, 1:12);
   for  mm = 1:12  
    for dd = 1:ndays(mm)  
        monthofy   = month(datetime(yy,mm,dd),'monthofyear');
        nn = norm(:,:,monthofy);
        anom(:,:,i)  = sez_chl - nn; %sez_chl is 3d matrix 72*46*46
        i=i+1;
    end     
   end
end

Answer 1

[Image Analyst]

There is a whole family of "outlier" functions, like rmoutliers(), etc. Look into them.

[Lilya]

Thanks for the reply, but it doesn't do the what i need. there is no outliers in the time series

[Image Analyst]

Note that you forgot to read this

TUTORIAL: How to ask a question (on Answers) and get a fast answer

and attach your data, so all we can do is guess. We have not seen your time series data, sez_chl, or norm.

[Lilya]

norm is a function in matalb

https://www.mathworks.com/help/symbolic/norm.html

also, i've attached the data.