[R] Help with interfacing C & R

[Oleg Sklyar]

 >     E:\My Documents\work\projects\landmarks\tryc>ls
 >     hello.c  hello2.r

It is always advisable not to have spaces in such directories (like the 
ones you want to include into a system variable), but fine.

 >     E:\My Documents\work\projects\landmarks\tryc>R CMD SHLIB hello.c
 >     'R' is not recognized as an internal or external command,
 >     operable program or batch file.

Your R is not in the PATH! You need to add it, see also below!

 >     E:\My Documents\work\projects\landmarks\tryc>echo %PATH%
 > 
C:\texmf\miktex\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\P
 >     rogram Files\ATI Technologies\ATI Control
 >     Panel;E:\PROGRA~1\F-Secure\Ssh;E:\Prog
 >     ram Files\ESTsoft\ALZip\;C:\Program
 >     Files\QuickTime\QTSystem\;E:\prg_files\tools
 > 
\bin;E:\prg_files\cygwin\bin;E:\prg_files\cygwin\lib;E:\prg_files\ActivePerl\Act
 > 
ivePerl\Perl\bin;E:\prg_files\ActivePerl\ActivePerl\Perl\lib;E:\Program
 >     Files\ES
 >     Tsoft\ALZip\

There are at least 2 mistakes that I see in your PATH above:
  - you need to add: E:\prg_files\R\R-2.4.1\bin;
  - you need to add path to wherever MinGW\bin is and add it before 
cygwin! if you do not have MinGW installed, download and install it.

I guess E:\prg_files\tools\bin are RTools, if so, this is fine. Your own 
program must not necessarily be in the PATH

--
Dr Oleg Sklyar | EBI-EMBL, Cambridge CB10 1SD, UK | +44-1223-494466