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I want to calculate event frequency with a moving average, i have event times

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Stefan 2012-1-6

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Hi all,

I have a list of the time points of events over 30 seconds, and I want to graph the frequency of events with a moving average (1 second window). If the density of events is high early on and low later, the y axis of the graph should have a negative slope.

In MATLAB, I've imported two lists: the time points, and 0-30 second time points at 20kHz.

What would be the best way of going about this?

Thanks, Stefan

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Sean de Wolski 2012-1-6

What does your data look like? It sounds like you may want to use conv() to implement the moving average.

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Image Analyst 2012-1-7

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Use interp1() to get elements that have a uniform time spacing. Then use conv(data, ones(1, windowSize)/windowSize) to do the moving average.

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