Library: | graphic |
See also: | grqq grqqu grppn |
Quantlet: | grqqn | |
Description: | generates a quantile-quantile plot to compare a variable with a normal distribution. |
Usage: | dp = grqqn(x {,col}) | |
Input: | ||
x | n x 1 vector, sample to be compared with a normal distribution | |
col | optional scalar, color of the plot; default col = grc.col.black | |
Output: | ||
dp | list, composed graphical object |
; loads the library graphic library("graphic") ; generates a dataset with 160 observations t =(normal(25)-8)|(normal(25)+8)|normal(100)|(normal(10)+25) ; generates a qq-plot to compare t with a normal distribution dp = grqqn(t) ; creates a display for plotting d = createdisplay(1,1) ; plots the qq-plot show(d, 1, 1, dp)
Shows a qq-plot