- Function File: normplot (X)
Produce normal probability plot for each column of X.
The line joing the 1st and 3rd quantile is drawn on the graph. If the underlying distribution is normal, the points will cluster around this line.
Note that this function sets the title, xlabel, ylabel, axis, grid, tics and hold properties of the graph. These need to be cleared before subsequent graphs using ’clf’.
Package: statistics