## ----hello, results='asis'---------------------------------------------------- cat('_hello_ **markdown**!', '\n') ## ----------------------------------------------------------------------------- 1+1 10:1 rnorm(5)^2 strsplit('hello, markdown vignettes', '') ## ----------------------------------------------------------------------------- n=300; set.seed(123) par(mar=c(4,4,.1,.1)) plot(rnorm(n), rnorm(n), pch=21, cex=5*runif(n), col='white', bg='gray')