Plots a chi-squared distribution

Usage

plot_chisq(
  df,
  from = NULL,
  to = NULL,
  n = 1000,
  add = FALSE,
  type = "l",
  xlab = expression(chi^2),
  ylab = "Probability Density",
  xlim = NULL,
  ...
)

Arguments

df: degrees of freedom (non-negative, but can be non-integer).
from: the starting x-value for the plot. If NULL, it will be set to 0 or -5 sd from the mean.
to: the ending x-value for the plot. If NULL, it will be set to the mean plus 5 sd.
n: the number of points to use in the plot. Default is 1000.
add: whether to add the curve to an existing plot (TRUE) or create a new plot (FALSE). Default is FALSE.
type: the type of plot to create. Default is "l" for a line plot.
xlab: the label for the x-axis. Default is expression(chi^2).
ylab: the label for the y-axis. Default is "Probability Density".
xlim: the limits for the x-axis. If NULL, it will be set to c(from, to).
...: additional arguments to be passed to the curve function.

Examples

 plot_chisq(5)


 set.seed(100)
 hist(rchisq(200, 5), prob = TRUE)
 plot_chisq(5, add = TRUE, col = "blue", lwd = 2)