[R] Rcmd check Error help

[Martin Maechler]

>>>>> "AndyL" == Liaw, Andy <andy_liaw at merck.com>
>>>>>     on Wed, 5 Jan 2005 20:09:14 -0500 writes:

    AndyL> The recommended way, I believe, is to _install_ the
    AndyL> package (say in some test directory) and try it out.
    AndyL> Only when you have no problem loading the package in
    AndyL> R from that installation would you then try R CMD
    AndyL> check.

yes.

    AndyL> When you install the package (as R CMD check does, in
    AndyL> the directory pkg.Rcheck), it concatenate all the
    AndyL> files in R/ into one file, and install it in the R/
    AndyL> subdirectory.  When the package is loaded, that file
    AndyL> is source()'ed into R.  If there are syntax errors,
    AndyL> that's where they are found.  So it'd be easier to
    AndyL> diagnose such problem if you install the package
    AndyL> first and try to load it.

yes.  One thing that helps much nowadays (newer R versions) is
to make sure that you do *not* lazyload by using

    R CMD INSTALL --no-lazy  <pkg>
		  ^^^^^^^^^ 

(or even adding 'LazyLoad: no' to the package DESCRIPTION file
 during development).
Only in this case, you can easily locate the file you were
asking (in the *installed* directory) as file  <pkgname>/R/<pkgname>

    AndyL> One possibility is to try and source() all the files
    AndyL> in the R/ directory under the source package to see
    AndyL> which one fails.  You can do that easily enough in
    AndyL> one simple loop.

    AndyL> HTH, Andy

    >> From: McGehee, Robert
    >> 
    >> R-help, I'm the primary developer for an increasingly
    >> large R package with over three thousand lines of
    >> code. Unfortunately, do the complexity of the code, I
    >> sometimes am required to change several interoperating
    >> parts of the package before testing for bugs and
    >> performance. And sometimes unnoticed syntax errors slip
    >> in that cause Rcmd check / INSTALL to fail with such
    >> messages as:
    >> 
    >> Error in parse(file, n, text, prompt) : syntax error on
    >> line 223 Execution halted
    >> 
    >> My question: what file should I be checking for line 223?
    >> When running Rcmd INSTALL, the previous version is
    >> restored on an install fail, so I can't check the install
    >> directory, the Rcmd check directory only produces two log
    >> files, and my R-package has at least a dozen files to
    >> choose from.
    >> 
    >> Aside from brute force commenting out file by file until
    >> the syntax error disappears (certainly a wasteful use of
    >> time), how can I find out where my error is?
    >> 
    >> Thank you, Robert
    >> 
    >> > version _ platform i386-pc-mingw32 arch i386 os mingw32
    >> system i386, mingw32 status major 2 minor 0.1 year 2004
    >> month 11 day 15 language R
    >> 
    >> Robert McGehee Geode Capital Management, LLC 53 State
    >> Street, 5th Floor | Boston, MA | 02109 Tel: 617/392-8396
    >> Fax:617/476-6389 mailto:robert.mcgehee at geodecapital.com