[R] how to make read-only data frames?

[ONKELINX, Thierry]

Dan,

You could write a function that just creates the data. And call this
function each time you need the data.

HTH,

Thierry


------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium 
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be 
www.inbo.be 

Do not put your faith in what statistics say until you have carefully
considered what they do not say.  ~William W. Watt
A statistical analysis, properly conducted, is a delicate dissection of
uncertainties, a surgery of suppositions. ~M.J.Moroney

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens Dan Kelley
Verzonden: vrijdag 11 januari 2008 15:13
Aan: r-help at r-project.org
Onderwerp: [R] how to make read-only data frames?


QUESTION: is there a way to make objects (e.g. data frames) read-only?

BACKGROUND: I am writing some functions that use a data frame
(frequencies
of tidal constituents) that I want to be read-only.  I can see how to
accomplish this within a single function (just define the data in the
function), but I'm not sure how to share read-only values between
(un-nested) functions.  Is there a more elegant method than duplicating
the
creation of the data frame in each function?


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