Sweave-startup

myfirstsweave.Rnw

% This is a Sweave template from TalesofR.wordpress.com.
% When a line is preceeded by a "%" sign, it will be ignored by the program.
% You can write what you want in this way. It usually serves for making invisible comments.
% If you want to make a comment inside the chunk of R code, the symbol to start the line must be "#", instead of "%"
% Let's start with the template:

\documentclass{article}
\begin{document}

% chunks of R code are initiated by "<>=", and ended by "@"
% with <<echo=FALSE>>=, the code is not printed, only the result.
% <<echo=FALSE, message=FALSE, etc...>>= % These are chunk options
You have to enter first the path to your R libraries, often located in your own user.

<<>>=
.libPaths("C:/Users/....../Documents/R/win-library/2.15")
@

The path is set. Let's begin with commands:
<<>>=
# this is a comment inside a chunk, it is not executed as code.
dat<- data.frame(t=seq(0, 2*pi, by=0.1) )
 xhrt <- function(t) 16*sin(t)^3
 yhrt <- function(t) 13*cos(t)-5*cos(2*t)-2*cos(3*t)-cos(4*t)
 dat$y=yhrt(dat$t)
 dat$x=xhrt(dat$t)
@

You can write what you want outside the chunks. \\
The next chunk is a plot:
<<label=fig1plot, fig=TRUE>>=
with(dat, plot(x,y, type="l"))
with(dat, polygon(x,y, col="hotpink"))
@

\end{document}