| 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