Return a list of options for a basic VARPRO analysis.
varpro_basic_opts(method = "fd_re", nnls = TRUE, ppm_left = 4, ppm_right = 0.2)
full list of options.
one of "td", "fd", "fd_re".
restrict basis amplitudes to non-negative values.
downfield frequency limit for the fitting range (ppm).
upfield frequency limit for the fitting range (ppm).