docs: Documenting new L2Tracer with a scenario and graph building example
diff --git a/examples/graphs/drop-graph.R b/examples/graphs/drop-graph.R
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+++ b/examples/graphs/drop-graph.R
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+#!/usr/bin/env Rscript
+# Copyright (c) 2012-2013 Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+
+
+# install.packages ('ggplot2')
+library (ggplot2)
+## # install.packages ('scales')
+## library (scales)
+
+#########################
+# Rate trace processing #
+#########################
+data = read.table ("drop-trace.txt", header=T)
+data$Node = factor (data$Node)
+data$Kilobits <- data$Kilobytes * 8
+data$Type = factor (data$Type)
+
+## data.rtr = data[grep("Rtr", data$Node),]
+
+# graph rates on all nodes in Kilobits
+g.all <- ggplot (data, aes (x=Time, y=Kilobits, color=Type)) +
+ geom_point (size=2) +
+ geom_line () +
+ ylab ("Packet drop rate [Kbits/s]") +
+ facet_wrap (~ Node) +
+ theme_bw ()
+
+png ("drop-trace-all-nodes.png", width=800, height=500)
+print (g.all)
+x = dev.off ()