plot.validateFDboost function

Methods for objects of class validateFDboost

Methods for objects that are fitted to determine the optimal mstop and the prediction error of a model fitted by FDboost.

## S3 method for class 'validateFDboost'
mstop(object, riskopt = c("mean", "median"), ...)

## S3 method for class 'validateFDboost'
print(x, ...)

## S3 method for class 'validateFDboost'
plot(
  x,
  riskopt = c("mean", "median"),
  ylab = attr(x, "risk"),
  xlab = "Number of boosting iterations",
  ylim = range(x$oobrisk),
  which = 1,
  modObject = NULL,
  predictNA = FALSE,
  names.arg = NULL,
  ask = TRUE,
  ...
)

plotPredCoef(
  x,
  which = NULL,
  pers = TRUE,
  commonRange = TRUE,
  showNumbers = FALSE,
  showQuantiles = TRUE,
  ask = TRUE,
  terms = TRUE,
  probs = c(0.25, 0.5, 0.75),
  ylim = NULL,
  ...
)

Arguments

• object: object of class validateFDboost
• riskopt: how the risk is minimized to obtain the optimal stopping iteration; defaults to the mean, can be changed to the median.
• ...: additional arguments passed to callies.
• x: an object of class validateFDboost.
• ylab: label for y-axis
• xlab: label for x-axis
• ylim: values for limits of y-axis
• which: In the case of plotPredCoef() the subset of base-learners to take into account for plotting. In the case of plot.validateFDboost() the diagnostic plots that are given (1: empirical risk per fold as a funciton of the boosting iterations, 2: empirical risk per fold, 3: MRD per fold, 4: observed and predicted values, 5: residuals; 2-5 for the model with the optimal number of boosting iterations).
• modObject: if the original model object of class FDboost is given predicted values of the whole model can be compared to the predictions of the cross-validated models
• predictNA: should missing values in the response be predicted? Defaults to FALSE.
• names.arg: names of the observed curves
• ask: defaults to TRUE, ask for next plot using par(ask = ask) ?
• pers: plot coefficient surfaces as persp-plots? Defaults to TRUE.
• commonRange,: plot predicted coefficients on a common range, defaults to TRUE.
• showNumbers: show number of curve in plot of predicted coefficients, defaults to FALSE
• showQuantiles: plot the 0.05 and the 0.95 Quantile of coefficients in 1-dim effects.
• terms: logical, defaults to TRUE; plot the added terms (default) or the coefficients?
• probs: vector of quantiles to be used in the plotting of 2-dimensional coefficients surfaces, defaults to probs = c(0.25, 0.5, 0.75)

Returns

No return value (plot method) or the object itself (print method)

Details

The function mstop.validateFDboost extracts the optimal mstop by minimizing the mean (or the median) risk. plot.validateFDboost plots cross-validated risk, RMSE, MRD, measured and predicted values and residuals as determined by validateFDboost. The function plotPredCoef plots the coefficients that were estimated in the folds - only possible if the argument getCoefCV is TRUE in the call to validateFDboost.