[R] how to organize a lot of R source files

[Hao Cen]

Hi Henrik,

Thanks for your suggestion. I created a directory with 10 R files and
tried the following and measured its time

system.time(sourceDirectory("~/fun", modifiedOnly = F))
system.time(sourceDirectory("~/fun", modifiedOnly = T))

But the second line seems to spend as much time as the first line, I
thought   the second line would be faster since no modification is made.

Also the first line reports a warning as follows
In readLines(con = fh) :
  incomplete final line found on "~/fun/util1.R"
I don't see such a warning when I use source.

Maybe the two issues are related. Please advise.

thanks

Jeff


On Fri, January 8, 2010 7:56 pm, Henrik Bengtsson wrote:
> library("R.utils"); sourceDirectory("myRFiles/", modifiedOnly=TRUE);
>
> See ?sourceDirectory (regardless what the Rd help say, any '...'
> argument is passed to sourceTo()).
>
> /Henrik
>
>
> On Fri, Jan 8, 2010 at 7:38 AM, Hao Cen <hcen at andrew.cmu.edu> wrote:
>
>> Hi,
>>
>>
>> I wonder what is a better way to organize a lot of R source files. I
>> have a lot of utility functions written and store them in several source
>> files (e.g util1.R, util2.R,..utilN.R). I also have a master file in
>> which the source command is used to load all the util.R files. When I
>> need to use the utility functions in a new project, I create a new R
>> file (e.g main.R) in which I "source" the master file.
>>
>> The problem with this approach is that anytime a single utility
>> function is modified, I need to rerun the source command in main.R to
>> load the master file, which loads all the utility R files via a loop
>> over each file. Sometimes I have to wait for 10 seconds to get them all
>> loaded. Sometimes I forget to run the source command. Is there a way in
>> R to 1)
>> only reload the file changed (like a make utility) when I run source on
>> all utility files and/or even better 2)  reload the changed utility
>> files, when I run a command that use one of those utility functions,
>> without the need for me to source those files.
>>
>> Not sure if packaging solves this issue because the library command has
>> be used every time a utility function is modified and in addition the
>> package has to be rebuilt. I don't worry about sharing the source files
>> at this moment as I am the only user of those utility files.
>>
>> This may be a common issue many R users face. I wonder how other R
>> users solve this issue.
>>
>> thanks
>>
>> Jeff
>>
>>
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>> PLEASE do read the posting guide
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>