Asked by PRIYA
on 29 Oct 2012

3793.197 3793.19735 3793.1977 3793.19805 3793.1984 3793.19875 3793.1991 3793.19945 3793.1998 3793.20015 3793.2005 3793.20085 3793.2012 3793.20155 3793.2019 3793.20225 3793.2026 3793.20295 3793.2033 3793.20365 3793.204 3793.20435........etc i have a data set for four hours....these datas are taken in 15 seconds interval and for four hours i will have 720 datas .....for the first hour i need to calculate average for first 10 minutes and remaining 50 minutes no need to calculate average and again for second hour, first 10 minutes i need to calculate average and so on til the completion of four hours.......since i m a beginner in matlab .....i need a help sir to write a matlab code for 10 minutes average for four hours data....

Answer by Pedro Villena
on 29 Oct 2012

Accepted answer

nHours = 4; %number of hours Ts = 15; %sampling period [s]

data = [3793.197... %your data is 960x1 size %data = rand(nHours*3600/Ts,1); %test data (4hours*3600second/15second)

meanT = 10*60; %test period [s] matrix = reshape(data,3600/Ts,nHours); out = mean(matrix(1:meanT/Ts,:));

Answer by PG
on 30 Oct 2012

A=rand(720,1);

A=reshape(A,240,3);

A_OUT=mean(A(1:40,:))

PG
on 30 Oct 2012

For your 3hrs requirment, above code will suffice.

PRIYA
on 30 Oct 2012

actually i m doing project regarding tsunami.....i need to collect tsunami data for 4 hours and each data will be taken for 15 seconds so for each minute i will have 4 data and for 4 hours 960 datas and i need to take average for first 10 minutes(i.e 40 data) in each hour and in second hour average of first 10 minutes and so on till 4th hour and i will get 4 average values and i need to apply those 4 average values in one formula that is Hp(t') = SUMMATION i=0 to 3 (w(i) H*(t-idt)) and weights is w(0) = 1.16818457031250 w(1) = -0.28197558593750 w(2) = 0.14689746093750 w(3) = -0.03310644531250 and the link for the above formula is (<http://www.ndbc.noaa.gov/dart/algorithm.shtml>) from this i will get Hp(t') value which is 961 value and again from 2 to 961 value i need to repeat the same procedure to get 962 value lik that we need to calculate for 5000 values , its like moving average ... for this process i need to create matlab code

Andrei Bobrov
on 30 Oct 2012

A=rand(720,1); A=reshape(A,240,[]); A_OUT=mean(A(1:40,:));

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## 3 Comments

## Azzi Abdelmalek (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/52152#comment_107940

why 720, in 4 hours you will have

4 * 60 *4 =960## Walter Roberson (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/52152#comment_107964

Please do not name individuals in your Tags. Please retag this question; see http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

## PRIYA (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/52152#comment_108117

SORRY its 3 hours data