[R] program and comment

2006-04-26 Thread Guojun Zhu
Hi.  I am a newbie to R. I need to do a courses
projects with some manipulation lots of data record
and some back-and-forth linear regression.  I do not
want to spend $100 for a SAS lincence, which professor
used.  So I decide to start to learn R to finish it. 
I am using R in Windows.  I feel it is somehow works
like mathemica.  I try to write the work into a little
program for future reference. (My data soon exceeds
the workplace.) So that should be a script, right? 
Then I can load it in file/source R code.  One thing
puzzles me is that how to write  comments in the
script.  I googled internet and the archive and did
not find any clues.  

First, can anyone confirm that I took the correct
approach for the problem?  I understand R is quite
different from program language like C/Pascal which I
am familiar with and seems people write it with quite
different style.  Second, can anyone show me some idea
about how to write  the comment.  Thanks.

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Re: [R] program and comment

2006-04-26 Thread Dirk De Becker
Guojun Zhu wrote:

Hi.  I am a newbie to R. I need to do a courses
projects with some manipulation lots of data record
and some back-and-forth linear regression.  I do not
want to spend $100 for a SAS lincence, which professor
used.  So I decide to start to learn R to finish it. 
I am using R in Windows.  I feel it is somehow works
like mathemica.  I try to write the work into a little
program for future reference. (My data soon exceeds
the workplace.) So that should be a script, right? 
Then I can load it in file/source R code.  One thing
puzzles me is that how to write  comments in the
script.  I googled internet and the archive and did
not find any clues.  

First, can anyone confirm that I took the correct
approach for the problem?  I understand R is quite
different from program language like C/Pascal which I
am familiar with and seems people write it with quite
different style.  Second, can anyone show me some idea
about how to write  the comment.  Thanks.
  

It seems a good idea to me to add all your commands in a script and to 
source it in order to execute it.
Comments can be added in R simply by starting a line with a #

Greetz,

Dirk

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Re: [R] program and comment

2006-04-26 Thread Hans-Peter
2006/4/26, Guojun Zhu [EMAIL PROTECTED]:
 Hi.  I am a newbie to R. I need to do a courses

*do* have a look at e.g.:
- http://cran.r-project.org/manuals.html (An Introduction to R)
- http://www.ms.unimelb.edu.au/~andrewpr/r-users/icebreakeR.pdf 
(contributed manual)
- http://cran.r-project.org/doc/contrib/Short-refcard.pdf  (reference-card)

to search the archives you can use:
- http://tolstoy.newcastle.edu.au/R/about.html
- http://finzi.psych.upenn.edu/search.html

 I am using R in Windows.

Have a look at Tinn-R  (editor)

 like mathemica.  I try to write the work into a little
 program for future reference. (My data soon exceeds
 the workplace.) So that should be a script, right?

yes

 Then I can load it in file/source R code.

source( yourScript.R )

check working path: getwd()
if you don't know what this is:
  ?getwd
  ?source

 First, can anyone confirm that I took the correct
 approach for the problem?

yes

I understand R is quite
 different from program language like C/Pascal which I
 am familiar with and seems people write it with quite
 different style.

it's a functional language and inherits from LISP (Scheme). You need
to read the manual.

Second, can anyone show me some idea
 about how to write  the comment.  Thanks.

# this is a comment

--
Regards,
Hans-Peter

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