Object Reference : Object View and Procedure Reference : Equation
  
 
funbias
Display functional coefficients bias results in graphical form.
For equations estimated using the functional coefficients method.
Syntax
eq_name.funbias(options)
Options
Basic Options
 
nolocalbw
Do not use the existing local pilot bandwidth (if it exists).
Note that this option is only available if a local pilot bandwidth has been set previously, either through the estimation step, using the setpilotbw proc, or through another view or proc which set the local bandwidth.
p
Print output.
Pilot Bandwidth Options
If a local pilot bandwidth exists, all of the pilot bandwidth computation options below will be ignored unless the “nolocalbw” option is specified.
 
noupdate
Do not update the local pilot bandwidth using the current pilot bandwidth computation.
plth =arg (default = “cv”)
Pilot bandwidth method: simple rule-of-thumb (“rot”), robust rule-of-thumb (“rotr”), residual squares criterion (“rsc”), modified multi cross-validation (“cv”), user-defined (“user”).
pltbw=arg (default =1)
User-defined bandwidth (if “plth=user”).
plthmin=arg (default = 0.1)
Bandwidth grid search minimum value (if not “plth=user”).
plthmax=arg (default =1)
Bandwidth grid search maximum value (if not “plth=user”).
plthlen=integer (default = 100)
Bandwidth grid search length (if not “plth=user”).
plthinc=integer (default = 10)
Bandwidth grid search increment step percentage increase (if not “plth=user”).
plthcup=integer (default = 10)
Stop rule: consecutive increases of objective function before stop (not available when “plth=user”).
pltm=arg (default = 10)
Modified multifold CV m-value: percentage of sample size used in bandwidth determination (when “plth=cv”).
pltq=integer (default = 4)
Modified multifold CV Q-value: percentage of sample size used in bandwidth determination (when “plth=cv”).
auxk=integer (default = 2)
Estimation polynomial degree for pilot stage in excess of final stage degree. This number should always be an even positive integer.
Examples
eq1.funbias(p)
displays and prints a graph of the functional bias results for each functional coefficient computed using the existing local pilot bandwidth if present, or estimating the pilot bandwidth, if not. If estimated, the local pilot bandwidth is updated with the result.
eq1.funbias(nolocalbw, noupdate, plth=rsc)
ignores an existing local pilot bandwidth and instead computes a pilot bandwidth using the residual squares criterion. The existing saved local pilot bandwidth is retained.
Cross-references
See “Functional Coefficient Regression” for discussion of functional coefficients estimation See “Functional Bias” for discussion of bias.
See also Equation::makefunobj and Equation::setpilotbw.