[R] Questions in R

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Nov 3 14:37:31 CET 2003

On Mon, 3 Nov 2003, John Fox wrote:

> At 11:40 AM 11/3/2003 +0000, =?iso-8859-7?q?vasilis=20pappas?= wrote:
> >Hello,
> >I have 4 questions in R and I am looking for 4 answers!
> >the questions are the below:
> >1) is there a function in R for the Least Significant Difference method 
> >for multiple comparisons?
> There is a multcomp package that implements many methods for multiple 
> comparisons, but I'm not sure whether it does LSD.

You don't need a special function.  Fisher's protected LSD first does an
overall F test, then uses the standard formulae as implemented by e.g.
se.contrast.  For balanced layouts the LSD is very simple indeed.

> >4) Whis function gives me the opprotunity to give data to my program while 
> >it's running?That is, how can i give information, like cin in C++, to my 
> >program will it is running in R.
> >
> See ?readline.

scan() would be a closer analog.  You can use source, read.table, the data 
editor, ....

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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