Downsampling by Averaging in Blocks

22 次查看（过去 30 天）
Farooq Wahab
Farooq Wahab 2016-3-5
回答： Andrei Bobrov 2016-3-5
Hello, I would like to downsample data simulated at 200 Hz to 50 Hz by averaging blocks of 4 and plot it versus time. For example, if y=[1,2,3,4,5,6,7,8,9,10,11,......], I would like to do averages of (1,2,3,4), then (5,6,7,8), and so and plot it versus t=[0:1/50:60], so that the downsampled data appears to be sampled at 50 Hz. The MATLAB downsample function seems to downsample by removing the data points. http://www.mathworks.com/help/signal/ref/downsample.html
Thanks.

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2016-3-5
y=[1,2,3,4,5,6,7,8,9,10,11];
out = nanmean(reshape([y(:); nan(mod(-numel(y),4),1)],4,[]));

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Multirate Signal Processing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by