I am looking for a way to add labels, i.e. absolute values, into a stacked bar chart using the basic plot f开发者_如何学Cunctions of R. The labels should be inside the stacked bars.
Thank you!
barplot
will return the mid x position of the bars, so you could do
mydata <- matrix(c(10, 21, 22, 33, 45, 23, 22, 43, 33), nrow=3)
# b will contain the x midpoints of the bars
b <- barplot(mydata)
# This will write labels in the middle of the bars, horizontally and vertically
text(b, colMeans(mydata), c("Label1", "Label2", "Label3"))
# This will write labels in the middle of the middle block
text(b, mydata[1,]+mydata[2,]/2, c("LabelA", "LabelB", "LabelC"))
EDIT: re-reading your question, I think this is what you want (or maybe not, but I'll write it anyways :D)
# Find the top y position of each block
ypos <- apply(mydata, 2, cumsum)
# Move it downwards half the size of each block
ypos <- ypos - mydata/2
ypos <- t(ypos)
text(b, ypos, mydata)
How about the simple function text()
?
You can simply add a string where ever you want, eg:
text (x = ..., y = ..., labels = c("foo bar 1000"))
Maybe you can use or inspect the barp function of the plotrix package
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