Plot better plots of smooth predictors in QGAMs — better_smooth

better_smooth_plot creates a smooth plot with confidence intervals using ggplot2. It basically is a wrapper for the base plot function.

better_smooth_plot(
  qgam,
  quantile = NULL,
  pred,
  plot.old = FALSE,
  xlab = NULL,
  ylab = "fit",
  size = 0.5,
  fill = "steelblue2",
  color = "black",
  alpha = 1)

Arguments

qgam: A qgam object created with qgam::qgam or extracted from a qgam::mqgam object, or a collection of qgams created with qgam::mqgam.
quantile: If qgam is a collection of qgam models, specify the quantile you are interested in. Not meaningful for single qgam objects.
pred: The smooth term you wish to plot. Must be one of the smooth terms given in the qgam formula.
smooth_term: obsolete: Use pred instead.
plot.old: Plot the original plot as well.
xlab: The x-axis label.
ylab: The y-axis label.
size: Size argument for the ggplot object; specifies the size of the line.
fill: Color argument for the ggplot object; specifies the color of the confidence interval.
alpha: Alpha argument for the ggplot object; specifies the transparency of the confidence interval.
color: Color argument for the ggplot object; specifies the color of the line.

Value

A ggplot object.

References

Fasiolo M., Goude Y., Nedellec R., & Wood S. N. (2017). Fast calibrated additive quantile regression. URL: https://arxiv.org/abs/1707.03307

Wickham, H. (2016). ggplot2: Elegant Graphics for Data Analysis. Springer-Verlag New York.

Author

D. Schmitz

Examples


# using a single qgam extracted from an mqgam object OR fitted with qgam::qgam
better_smooth_plot(qgam = mtqgam_qgam,
  pred = "numeric_2")
#> i Plotting smooth term numeric_2.


# using a qgam that is part of an mqgam object
library(qgam)

better_smooth_plot(qgam = mtqgam_mqgam,
  quantile = 0.5,
  pred = "numeric_2")
#> i Plotting smooth term numeric_2.


# combining better_smooth_plot with ggplot2
better_smooth_plot(qgam = mtqgam_qgam,
  pred = "numeric_2") +
  theme_void() +
  labs(subtitle = "This is a subtitle")
#> i Plotting smooth term numeric_2.