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Moving average

Hi all,

Is there a Scilab function to compute a running average over a specified number of column entries within an array:
i.e:
Values in array3 cell running average
65.3
34.7
77.0
45.3
104.0
2
0
Thanks in advance!
Andy


Scilab 26-10-18, 8:20 p.m. Noiser1234
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Not as such. However, a routine for calculating a simple moving average can be easily written. Here is one. Please test it extensively before relying on it.
Please feel free to improve this code and report fail cases.
//Function to compute simple moving average. 
//vec is a simple row or column vector
//windw is the number of data points over which the average has to be computed
//avg is a column vector consisting of the computed moving averages
//Example:
//-->sma([6,3,7,4,10,2,0],3)
// ans  =
// 
//    5.3333333  
//    4.6666667  
//    7.         
//    5.3333333  
//    4.
//Author: Rupak Rokade
//FOSSEE, IIT Bombay

function avg=sma(vec, windw)
    avg=[]
    for i=1:length(vec)-windw+1
            av=sum(vec(i:i+(windw-1)))/windw
            avg=[avg;av]
    end
endfunction
29-10-18, 11:59 a.m. rupakrokade
Thanks again rupakrokade! 

This seems to work perfectly with stings of numbers (as in your example above) - my only question is, can this be modified to work with a vector (i.e. 1x50 number array?). 

Maybe I'm missing something in my code, but I get an error when I replace ([6,3,7,4,10,2,0],3)with ([x],3)where "x" represents my array of values.

Thanks in advance!

Andy

29-10-18, 8:20 p.m. Noiser1234

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