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Visualize chi square distribution

Source: R/vdist-chisquare.R
vdist_chisquare_plot.Rd

Visualize how changes in degrees of freedom affect the shape of the chi square distribution. Compute & visualize quantiles out of given probability and probability from a given quantile.

Usage

vdist_chisquare_plot(
  df = 3,
  normal = FALSE,
  xaxis_range = 25,
  print_plot = TRUE
)

vdist_chisquare_perc(
  probs = 0.95,
  df = 3,
  type = c("lower", "upper"),
  print_plot = TRUE
)

vdist_chisquare_prob(
  perc = 13,
  df = 11,
  type = c("lower", "upper"),
  print_plot = TRUE
)

Arguments

df

Degrees of freedom.

normal

If TRUE, normal curve with same mean and sd as the chi square distribution is drawn.

xaxis_range

The upper range of the X axis.

print_plot

logical; if TRUE, prints the plot else returns a plot object.

probs

Probability value.

type

Lower tail or upper tail.

perc

Quantile value.

See also

Chisquare

Examples

# visualize chi square distribution
vdist_chisquare_plot()

vdist_chisquare_plot(df = 5)

vdist_chisquare_plot(df = 5, normal = TRUE)


# visualize quantiles out of given probability
vdist_chisquare_perc(0.165, 8, 'lower')

vdist_chisquare_perc(0.22, 13, 'upper')


# visualize probability from a given quantile.
vdist_chisquare_prob(13.58, 11, 'lower')

vdist_chisquare_prob(15.72, 13, 'upper')