The “qqnorm” Function in R

• Package: Base R (No specific package)

• Purpose: To create a quantile-quantile (Q-Q) plot for visualizing the distribution of a dataset against a theoretical normal distribution.

• General Class: Statistical Visualization

• Required Argument(s):

• x: A numeric vector or a data frame.

• Notable Optional Arguments:

• plot.it: A logical value indicating whether to create the Q-Q plot (default is TRUE).

• ...: Additional arguments passed to or from other methods.

• Example:

• # Example usage
  # Generate a random sample from a normal distribution
  data <- rnorm(100)
  
  # Create a Q-Q plot
  qqnorm(data)

• In this example, the qqnorm function is used to create a Q-Q plot for a randomly generated sample from a normal distribution. The resulting plot provides a visual comparison between the sample quantiles and the quantiles of a theoretical normal distribution.