问题
I would like to make scatter plot in R, of variables Y and X over categories Z (separated by colors) but with a special legend. Not a legend box, but for the category names to appear as texts along the points for that category, and the text be the same color as the points.
Is there a way for R to do this automatically?
PS: I know I this could be done "manually" adding "text()" and specifying the location and color of each category
For example, I'm trying to replicate the look of this chart (which I made manually in Stata):
EDIT: after reading the comments bellow, here is the data, and the solution to the problem:
library(ggplot2);library(reshape);library(scales);library(directlabels)
dat <- read.csv("https://dl.dropboxusercontent.com/u/4329509/Fdat_graf.csv")
dat_long <- melt(dat, id="ano")
p <- qplot(ano,value, data=dat_graf_long, colour=variable)+ scale_y_log10(breaks=c(.1,1,10,100,500,1000),labels = comma) + scale_x_continuous(breaks=seq(from=1960, to=2010, by=10)) + theme_bw()
direct.label(p)
For those interested, the chart if for the sizes of commonly used datasets (household survey (PNAD, ~0.3GB ), CENSUS microdata (~10GB), and a registry of all employment contracts (RAIS, 20GB per year)), against the available memory (RAM) of a decently sized server (baseline is a 96GB RAM server in 2010) growing at Moore's Law rate. It shows how was once thought as "Big Data" is bound to become "small data" due to the advance of Moore's Law.
来源：https://stackoverflow.com/questions/25612656/legend-as-text-alongside-points-for-each-category-and-with-same-collor