[R] What exactly does rchkusr() do?

From: Guilherme Veiga da Rocha <gvrocha_at_gmail.com>
Date: Fri, 22 Feb 2008 08:26:32 -0800

        Hi all,         

        I am trying to compile a fortran routine originally written for R from within matlab.         

        It all worked fine, but the newest version of the Fortran code has a call to rchkusr() and I now get a message that this is an undefined symbol.         

        I am under the impression that rchkusr() just serves to let the processor take care of interruption messages (typically, the user frantically pressing Ctrl-C to stop running).

  1. Is that right?
	Another two questions are:
	1 - If I choose to keep this "interruption checkpoint" in the  
routine, what library is rchkusr() in and how do I link it when compiling the Fortran object?

        2 - True of False: If I choose to comment that line, that just means that the user will not be able to stop running the calculations while the processor executes the Fortran bit of the code.         

        Answers to any of the a, 1, 2 questions above is welcome.         

	And in case you are wondering:

- I am trying to link the Fortran to matlab so I can compare results
to other similar routines coded in matlab;
- This is in the glasso package by Friedman, Hastie, Tibshirani.
Thanks for any help. Cheers, Guilherme Rocha ______________________________________________
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