ws wrote:
Hi R-ers
Does anyone know how if there is a way to force pyramid plot where
you determine the bottom axis range? I want to compare many
different pyramids, so I am hoping to force the bottom axis range
from 0% to 10%.
Here is the code so far, if it matters:
mk.pyr = function(data, pumas=NULL, fb.class=NULL, info="") {
# Makes population pyramids
# Assumes certain columns names in data -- SEX, AGEF, PUMA
males.i = data$SEX==1
females.i = data$SEX==1
if (is.null(pumas)) {
xy.pop = 100*as.double(prop.table(xtabs(pwgtp~AGEF,
data[males.i,])))
xx.pop = 100*as.double(prop.table(xtabs(pwgtp~AGEF,
data[females.i,])))
mytitle = sprintf("Population Pyramid for all pumas. %s.",
info)
} else {
pumas.i = data$PUMA %in% pumas
xy.pop = 100*as.double(prop.table(
xtabs(pwgtp~AGEF, data[males.i & pumas.i,])))
xx.pop = 100*as.double(prop.table(
xtabs(pwgtp~AGEF, data[females.i & pumas.i ,])))
mytitle = sprintf("Population Pyramid for %s",
paste(paste(pumas, collapse=", "), ".", info, "."))
}
agelabels<-c("0-4","5-9","10-14","15-19","20-24",
"25-29","30-34","35-39","40-44","45-49",
"50-54","55-59","60-64","65-69","70-74",
"75-79","80-44","85+")
xycol<-color.gradient(.5,.5,.5,18)
xxcol<-color.gradient(.5,.5,.5,18)
par(mar=pyramid.plot(xy.pop,xx.pop,labels=agelabels,
main=mytitle,xycol=xycol,xxcol=xxcol))
}
Hi ws,
You could tweak pyramid.plot in the plotrix package to do this.
Jim
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