11.6.5.3. Drawing the residuals
The residuals can be visualised with the standard drawResiduals method of any TCalibration object.
Its arguments and options have already been detailed in
Drawing the parameters, and its prototype
is recalled here for convenience:
drawResiduals(sTitre, variable = "*", select = "1>0", option = "")
Since no specific implementation has been added for MCMC calibration, the main point to clarify is how the a priori and a posteriori configurations are defined:
A priori configuration: obtained from the parameter initialisation. This can either be provided explicitly by the user through the method described in Initialising the process, or, if not specified, generated from a random draw according to the given a priori probability density.
A posteriori configuration: by default, the mean of the posterior distribution is used (as discussed in the constructor section of this class, see Constructing the TMCMC object). If the option “mode” is specified when constructing the
TMCMCobject, then the posterior mode is estimated and used instead.
An example of this function is shown in Figure 13.73.