set.SB: Set the coherent baseline
In BBEST: Bayesian Estimation of Incoherent Neutron Scattering Backgrounds

Description Usage Arguments Details Value

set.SB sets the baseline, describing coherent neutron scattering caused by uncorrelated atomic motion or any other baseline that needs to be preserved in the recovered signal.

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set.SB(data, SB=NA, n.atoms=NA, scatter.length=NA, ADP=NA, 
       fit=FALSE, oneADP=TRUE, ADP.lim = c(0, 0.05))

`data`	an object of type `data`. See `set.data` for details.
`SB`	numeric vector which, if not `NA`, determines the baseline. See `BBEST-package` for details.
`n.atoms, scatter.length, ADP`	numerics. Specify the number of atoms of each atomtype in the unit cell, atomic scattering factors and atomic displacement parameters (ADP), respectively.
`fit`	logical, whether to fit ADP.
`oneADP`	logical. If `TRUE` a single parameter is used for all the APDs.
`ADP.lim`	numeric vector that specifies the lower and upper bounds for the fitted ADP.

Baseline SB has to be specified. If no baseline is needed fill SB with zeroes. If n.atoms, scatter.length and ADP parameters are specified, the baseline is calculated according to

SB(x) = 1 - \frac{ ∑_i{N_i f_i^2 e^{-ADP_i x^2}} }{ N<f^2> }(1 - \frac{<f>^2-<f^2>}{<f>^2}).

If ADP parameters are to be fitted, indicate n.atoms, scatter.length and set parameter fit to TRUE. Set oneADP to the desired value.

An object of type data. Element