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Downsample reduces the sampling rate of the input AOs by an integer factor, which can be very useful for example to reduce data load.
With the following parameters:
Examples
1. Downsampling a sequence of random data at original sampling rate of 10 Hz by a factor of 4 (fsout = 2.5 Hz) and no offset.
pl = plist('tsfcn', 'randn(size(t))','fs',10,'yunits','m'); % create an AO of random data with fs = 10 Hz x = ao(pl); % create AO pl_down = plist('factor', 5); % add the decimation factor x_down = downsample(x, pl_down); % downsample the input AO, x iplot(x, x_down) % plot original,x, and decimated,x_down, AOs
2. Downsampling the same AO by a factor of 4 (fsout = 2.5 Hz) and offset = 10.
pl_downoff = plist('factor', 4,'offset',10); % add decimation factor and offset parameter x_downoff = downsample(x, pl_downoff); % downsample the input AO, x iplot(x, x_downoff) % plot original,x, and decimated,x_downoff, AOs
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Topic 2 - Pre-processing of data | Upsampling a time-series AO | ![]() |
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