Getting a histogram (in this case, a bar chart) with varying-width bars is so
easy with R that it might be worth exporting your data to R and trying it. Here
is sample code using the data you posted:
# Age Freq
# --- ---------
# 0-4 28
# 5-9 46
# 10-15 58
# 16 20
# 17 31
# 18-19 64
# 20-24 149
# 25-59 316
age <- c(28,46,58,20,31,64,149,316)
names(age) <- c("0-4","5-9","10-15","16","17","18-19","20-24","25-59")
width <- c(5,5,6,1,1,2,5,35)
# Plain vanilla barplot
barplot(age/width, width=width)
# Embellished version with colors. The abline(0,0) function puts the
# horizontal line on the x axis
barplot(age/width, width=width, col="beige", border="brown")
abline(0,0)
(The # are comments.) Note that age is divided by the width of the intervals.
If your data are not already grouped (e.g., you have age in years rather than in
intervals of years), use the hist function with the probability=TRUE option,
like this --
hist(age, probability=TRUE, breaks=c(...))
substituting the comma-separated boundaries you want for ... inside of c(...).
Larry Hotchkiss
Larry Hotchkiss
University of Delaware
IT User Services -- Smith Hall
Newark, DE 19716
302-831-1989
[hidden email]
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