resid_hist_qq: Plot residual histograms and Q-Q plots.
In ricompute/llusmstats: Helper Functions for LLU SM Stats Classes

Description Usage Arguments Value See Also Examples

View source: R/resids.R

Plot histograms and Q-Q plots of model residuals to assess residual normality.

resid_hist_qq(model, plot_type = "both", resid_type = "std", bins = 9,
  qqline = TRUE, htitle = "Histogram", qtitle = "Normal Q-Q Plot",
  subtitle = TRUE, hxlab = "Residuals", qxlab = "Theoretical Quantiles",
  hylab = "Count", qylab = "Sample Quantiles", ...)

`model`	An `lm` or `aov` model object.
`plot_type`	A string indicating which type of plot to produce. The default `"both"` produces both histograms and Q-Q plots side by side, `"hist"` produces only histograms, and `"qq"` produces only Q-Q plots.
`resid_type`	A string indicating which type of residuals to use. The default `"std"` uses standardized residuals, `"unstd"` uses unstandardized residuals, and `"both"` produces both plots stacked with `"unstd"` on top and `"std"` on the bottom.
`bins`	How many bins to use for the histograms.
`qqline`	A logical indicating whether to include a qqline on the Q-Q plots.
`htitle`	A string indicating what to title the histograms.
`qtitle`	A string indicating what to title the Q-Q plots.
`hxlab`	A string indicating what to title the histogram x-axes.
`qxlab`	A string indicating what to title the Q-Q plot x-axes.
`hylab`	A string indicating what to title the histogram y-axes.
`qylab`	A string indicating what to title the Q-Q plot y-axes.
`...`	Additional arguments passed to `ggplot2::theme()`.
`subittle`	A logical indicating whether to include the default subtitles.

If single plot_ and resid_ types are specified (i.e., a single histogram or Q-Q plot is requested), a ggplot2 plot object is returned. If more than one plot is requested, a call to gridExtra::grid.arrange draws on the current device and a gtable is returned.

resid_fitted_plot for residual vs. fitted values plots.

mtcars_lm <- lm(mpg ~ wt, mtcars)
resid_hist_qq(mtcars_lm)
resid_hist_qq(mtcars_lm, plot_type = "qq", resid_type = "unstd")
resid_hist_qq(mtcars_lm, resid_type = "both")