XploRe Help : grhistcl

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Library:	graphic
See also:	grboxcl grdotcl

Quantlet:		grhistcl
Description:		generates a histogram from classified data.

Usage:	`hp = grhistcl (cl, fr{, col})`
Input:
	`cl`	n x 1 vector of interval bounds
	`fr`	n x 1 vector of interval frequencies
	`col`	(optional) color of the histogram
Output:
	`hp`	composed graphical object

Note:

The cl vector represents a grid (must be ordered ascendently) and the corresponding fr vector represents the numbers of observations in the corresponding intervals (given by gr vector). E.g., cl=#(1,2,3) and fr=#(7,4) represents the dataset containing 7 observations in the interval [1,2) and 4 observations in the interval [2,3). The representative for each interval is the mean of its boundaries.

Example:

library("graphic") ; Data about people killed in road accidents in 1998 ; Source: Statistisches Jahrbuch 1999, Germany ; Age classes age = #(0, 15, 18, 25, 65, 90) ; No. of killed people kill = #(304, 359, 1724, 4074, 1328) bp = grhistcl(age, kill, 1) d = createdisplay(1, 1) show(d, 1, 1, bp)

Result:

A blue histogram of people killed in road accidents is shown.

Author: S. Klinke, 20020227