lastxx   = $(shell basename `ls -tr *.Rnw | tail -n 1` .Rnw)
TEXFILE = $(lastxx)

all: $(TEXFILE).pdf

pdf: $(TEXFILE).pdf

latex: $(TEXFILE).tex
	time pdflatex ${TEXFILE} 

%.tex: %.Rnw
	echo "library(knitr);knit(\"$<\");" | time R --vanilla 

%.pdf: %.tex 
	time pdflatex $<
