[R] how to plot two graphs in one figure

Dear helpers, I am trying to plot two survival curves in the same figure. plot(survival) // in matlab, one just need to call "hold on" plot(survival2) I am wondering how to do it in R. Thank you very much! -- Zhandong Liu Genomics and Computational Biology University of Pennsylvani

[R] how to clear window in mac version of R?

I've tried many times on google. Can't find an answer. What is the command of clear window in mac version of R. PS: I know in windows version of R, you can use Ctrl+L. Thanks. -- Zhandong Liu Genomics and Computational Biology University of Pennsylvania 616 BRB II/III, 421 Curie

Re: [R] Why R is 200 times slower than Matlab ?

n CRAN, jit, that > > aims to provide similar speedups. > > http://www.milbo.users.sonic.net/ra/index.html > > Great! I just found out about ra. In Python I love psyco and I guess I > will test > ra soon. > > Thanks, > N.- > > -- > http://arhuaco.org > -- Zh

Re: [R] Why R is 200 times slower than Matlab ?

, 2008 at 4:47 PM, Ray Brownrigg <[EMAIL PROTECTED]> wrote: > On Thu, 01 May 2008, Zhandong Liu wrote: > > I am switching from Matlab to R, but I found that R is 200 times slower > > than matlab. > > > > Since I am newbie to R, I must be missing some important programmi

[R] Why R is 200 times slower than Matlab ?

(fc_matrix) } For an input vector of size 300. It took R 2.17 seconds to run. But the same code in matlab only needs 0.01 seconds to run. Am I missing sth in R.. Is there a away to optimize. ??? Thanks -- Zhandong Liu Genomics and Computational Biology University of Pennsylvania 616 BRB II/III