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Turn numeric,data.frame,matrix into fraction form.
OuYang Ming Maintainer: OuYang Ming <oula2004@163.com>
Friedrich Leisch, 2008 Creating R packages: A Tutorial Zhang Jinlong, How to create R package under Windows FAQ in R-PROJECT
r=8 is.wholenumber(r) a=14 b=32 c=gcd(a,b) x=1/6 fra(x) y=c(1/2,1/3,1/9) fra.m(y) z=data.frame(1/2) fra.m(z) q=matrix(1) fra.m(q)
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