Scales spectra in an ir object

Scales spectra in an ir object

Usage

ir_scale(x, center = TRUE, scale = TRUE, return_ir_flat = FALSE)

Arguments

x

An object of class ir, where all non-empty spectra have identical wavenumber values.

center

either a logical value or numeric-alike vector of length equal to the number of columns of x, where ‘numeric-alike’ means that as.numeric(.) will be applied successfully if is.numeric(.) is not true.

scale

either a logical value or a numeric-alike vector of length equal to the number of columns of x.

return_ir_flat

Logical value. If TRUE, the spectra are returned as ir_flat object.

Value

x where spectra have been scaled, i.e. from each intensity value, the average across all spectra is subtracted (when center is a logical value), or the respective value in center is subtracted (when center is numerical), and each intensity value is divided by the standard deviation of the intensity values at this wavenumber across all spectra (when scale is a logical value), or the respective value in scale (when scale is numerical). NAs are omitted during this process.

Examples

ir_sample_data |>
 ir_scale() |>
 plot()