On 08.08.2012 08:53, Eva Prieto Castro wrote:
Hello, Greg:
That is one of the solutions I have tried; the problem is that I can't obtain a
package in this way, because an glo-internal.R file is generated (glo is the
name of the package) and when I try to create the package an error message
appears (a parse error).
The content of the glo-internal.R file is the following:
.glo.env <-
<environment>
To avoid parser errors, replace <environment> by something that is
syntactically valid, in this case: new.env().
Best,
Uwe Ligges
where .glo.env is the name of the new environment I create in my source code.
What am I doing wrong?.
Thanks again for your help.
Regards.
Eva
--- El mar, 7/8/12, Greg Snow <538...@gmail.com> escribió:
De: Greg Snow <538...@gmail.com>
Asunto: Re: [R] Problem with global variable building a package
Para: "Eva Prieto Castro" <evapcas...@yahoo.es>
CC: R-help@r-project.org
Fecha: martes, 7 de agosto, 2012 23:30
Probably the best thing to do is create an environment within the
package that you can assign to and read from.
Somewhere in the source code for the package include a line like:
my.env <- new.env()
then within any functions defined after that line you can set
variables within the environment with code like:
 my.env$paramA <- 3
and other functions can then read my.env$paramA. This way you don't
need to worry about assign or <<- and all your functions will have
access to the same set of variables (but they won't interfere with the
users workspace).
On Tue, Aug 7, 2012 at 1:09 AM, Eva Prieto Castro <evapcas...@yahoo.es> wrote:
Hi,
My name is
Eva and this is my first message here. My English is not very good, but I hope
you can understand my question, in the context of an academic project.
I have
developed several functions in R and the
idea is that the user can access functions in order to:
1)
Alter
parameters in relation with data and type of analysis.
2)
Run
statistical analysis (Text and pdf files with results will be generated).
3)
View
the value of the most important parameters.
All the
parameters I need are stored in a list object, and this list is used in all the
functions along the cycle performed by the user, but I would like the user does
not need to pass the name of the list as argument when he/she runs the different
functions, so I think I need to treat the list as a global variable.
Firstly, I
used the global assignment operator (“<<-“); secondly, I used “get� and
“assign�
functions and even I used a new.env() in order to use a new environment
exclusively for my list. However, when I try to build a package with all my
functions I don’t reach this end, because of an error in parse process.
My question
for you is the following: taking into account that my end is to build a
package, what can I do with this “global� list?. How can I treat it?.
Thanks in
advance.
Regards,
Eva
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