spant (version 3.7.0)

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

Description

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

Usage

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

Value

mrs_data object with additive normally distributed noise.

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 (unless noise_free_input is set to FALSE). 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.

noise_free_input

accounts for the reference data already containing noise when set to FALSE. Defaults to TRUE.