Add noise to an mrs_data object to match a given SNR.

add_noise_spec_snr(
  mrs_data,
  target_snr,
  sig_region = c(4, 0.5),
  ref_data = NULL
)

Arguments

mrs_data: data to add noise to.
target_snr: desired spectral SNR, note this assumes the input data is noise-free, eg simulated data. Note the SNR is estimated from the first scan in the dataset and the same noise level is added to all spectra.
sig_region: spectral limits to search for the strongest spectral data point.
ref_data: measure the signal from the first scan in this reference data and apply the same target noise level to mrs_data.

mrs_data object with additive normally distributed noise.