filter function for aggregation of data

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Camilla Santicoli
Camilla Santicoli 2015-4-27
评论： Thorsten 2015-4-27
Hi everybody! I'm wondering if there is a way to solve the following problem in a more efficient way instead of a for cycle: I have a vector of hourly values and I would like to aggregate these values to 3 hour values with a moving window such that the first value would be the sum of the first three elements, the second value the sum of element 2,3 and 4, the third value the sum of element 3,4 and 5 and so on... I used a for loop but this takes me a lot of time. I knwo that this can be done with the filter function but I didn't understand how it works exactly. Does anybody know how to solve it? Thanks a lot Camilla

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Thorsten
Thorsten 2015-4-27
x = randi(10, [1 10]); % sample data
F = 1/3*ones(1,3); % filter
xm3 = conv(x, F, 'valid');
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