plot.FDboost function

Plot the fit or the coefficients of a boosted functional regression model

Takes a fitted FDboost-object produced by FDboost() and plots the fitted effects or the coefficient-functions/surfaces.

## S3 method for class 'FDboost'
plot(
  x,
  raw = FALSE,
  rug = TRUE,
  which = NULL,
  includeOffset = TRUE,
  ask = TRUE,
  n1 = 40,
  n2 = 40,
  n3 = 20,
  n4 = 11,
  onlySelected = TRUE,
  pers = FALSE,
  commonRange = FALSE,
  ...
)

plotPredicted(
  x,
  subset = NULL,
  posLegend = "topleft",
  lwdObs = 1,
  lwdPred = 1,
  ...
)

plotResiduals(x, subset = NULL, posLegend = "topleft", ...)

Arguments

• x: a fitted FDboost-object
• raw: logical defaults to FALSE. If raw = FALSE for each effect the estimated function/surface is calculated. If raw = TRUE the coefficients of the model are returned.
• rug: when TRUE (default) then the covariate to which the plot applies is displayed as a rug plot at the foot of each plot of a 1-d smooth, and the locations of the covariates are plotted as points on the contour plot representing a 2-d smooth.
• which: a subset of base-learners to take into account for plotting.
• includeOffset: logical, defaults to TRUE. Should the offset be included in the plot of the intercept (default) or should it be plotted separately.
• ask: logical, defaults to TRUE, if several effects are plotted the user has to hit Return to see next plot.
• n1: see below
• n2: see below
• n3: n1, n2, n3 give the number of grid-points for 1-/2-/3-dimensional smooth terms used in the marginal equidistant grids over the range of the covariates at which the estimated effects are evaluated.
• n4: gives the number of points for the third dimension in a 3-dimensional smooth term
• onlySelected,: logical, defaults to TRUE. Only plot effects that where selected in at least one boosting iteration.
• pers: logical, defaults to FALSE, If TRUE, perspective plots (persp) for 2- and 3-dimensional effects are drawn. If FALSE, image/contour-plots (image, contour) are drawn for 2- and 3-dimensional effects.
• commonRange: logical, defaults to FALSE, if TRUE the range over all effects is the same (does not affect perspecitve or image plots).
• ...: other arguments, passed to funplot (only used in plotPredicted)
• subset: subset of the observed response curves and their predictions that is plotted. Per default all observations are plotted.
• posLegend: location of the legend, if a legend is drawn automatically (only used in plotPredicted). The default is "topleft".
• lwdObs: lwd of observed curves (only used in plotPredicted)
• lwdPred: lwd of predicted curves (only used in plotPredicted)

Returns

no return value (plot method)

See Also

FDboost for the model fit and coef.FDboost for the calculation of the coefficient functions.