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Resample a PhysioExperiment to a target sampling rate

Source: R/align-signals.R
alignToRate.Rd

Resamples all assays in a PhysioExperiment object so that the resulting data correspond to the specified target sampling rate. If the PhysioPreprocess package is available and method = "linear", its resample() function is used; otherwise an internal interpolation is applied.

Usage

alignToRate(x, target_rate, method = c("linear", "spline", "fft"))

Arguments

x

A PhysioExperiment object.

target_rate

Numeric scalar: desired sampling rate in Hz.

method

Character: resampling method. One of "linear" (default), "spline", or "fft".

Value

A new PhysioExperiment with resampled data and updated samplingRate. The assay name is preserved from the original.

See also

alignSignals(), mergePhysio(), MultiPhysioExperiment()

Examples

eeg_data <- matrix(rnorm(1000 * 4), nrow = 1000, ncol = 4)
pe <- PhysioExperiment(
  assays = list(raw = eeg_data),
  colData = S4Vectors::DataFrame(
    label = paste0("Ch", 1:4),
    type = rep("EEG", 4)
  ),
  samplingRate = 1000
)
pe500 <- alignToRate(pe, target_rate = 500)
samplingRate(pe500)  # 500
#> [1] 500