How to calculate mean to an equal area in Matlab?

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Xuefei Sun 2021-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/753004-how-to-calculate-mean-to-an-equal-area-in-matlab

评论： Xuefei Sun 2021-2-22

I have 900000 time data and 900000 speed data. I need to calculate the mean speed for each 30secs and plot them. How can I get that? Thank you!

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James Tursa 2021-2-22

Running average, or average of blocks? Is the time data equally spaced?

Xuefei Sun 2021-2-22

Yes, the time data is equally spaced from 1 sec to 900000 sec. And I should calculate mean speed for each 3 sec. Like from 1 to 3, 4 to 6, 7 to 9, ect. And plot them

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James Tursa 2021-2-22

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编辑：James Tursa 2021-2-22

在 MATLAB Online 中打开

n = 3; % or whatever number of samples you need, must be divisible into size of data
time_average = mean(reshape(time_data,n,[]));
speed_average = mean(reshape(speed_data,n,[]));
plot(time_average,speed_average)

But I still have another problem. If I block the time, it seems like the mean speed responding to a certain time(the mean time). But I want to plot the speed sustained in that 3 sec. I mean I want to plot a stragnt line in each 3 sec. Could you teach me how to do that?

Xuefei Sun 2021-2-22