Utility functions

frites.utils:

Global utility functions.

Time-series processing

downsample(x, sfreq, down[, axis, verbose])	Data downsampling for DataArray.
acf(x[, axis, demean])	Compute the autocorrelation function.

Data smoothing

savgol_filter(x, h_freq[, axis, sfreq, ...])	Filter the data using Savitzky-Golay polynomial method.
kernel_smoothing(x, kernel[, axis])	Apply a kernel smoothing using the fftconvolve.

Data selection

time_to_sample(values[, sf, times, round, ...])	Convert values from time to sample space.
get_closest_sample(ref, values[, precision, ...])	Get the sample of closest value in a reference time vector.
split_group(x[, names, axis, new_axis, average])	Split data group.