ggnostic - leave one out model sigma

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Description

A function to display stats::influence's sigma value.

Usage

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ggally_nostic_sigma(data, mapping, ..., lineColor = brew_colors("grey"),
  linePosition = attr(data, "broom_glance")$sigma)

Arguments

data, mapping, ..., lineColor

parameters supplied to ggally_nostic_line

linePosition

line that is drawn in the background of the plot. Defaults to the overall model's sigma value.

Details

As stated in stats::influence documentation:

sigma: a vector whose i-th element contains the estimate of the residual standard deviation obtained when the i-th case is dropped from the regression. (The approximations needed for GLMs can result in this being 'NaN'.)

A line is added to display the overall model's sigma value. This gives a baseline for comparison

Value

ggplot2 plot object

See Also

stats::influence

Examples

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dt <- broomify(stats::lm(mpg ~ wt + qsec + am, data = mtcars))
ggally_nostic_sigma(dt, ggplot2::aes(wt, .sigma))

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