On 9/17/10 12:46 PM, Jeff Newmiller wrote:
If having the definition of the function appear when you enter the name of the function
elicits a "hate" response, then perhaps you should not be using R. That
characteristic of R is fundamental and unlikely to change: in R everything is an object,
and the result of evaluating an expression is displayed at the command line. Other
languages have different unifying principles, and may be appropriate for different tasks.
Well, *hate* or *love* is just a matter of time and / or habit, so it
will not interfere with me doing anything, especially in work related. I
dont mind learning anything that will serve me well. Indeed, some
projects that I am currently working with involve some R packages and
hence some R coding as well, so I will use R no matter if I hate it or not.
Anything that can be done in R could be done in, say, C, but by the time you
did so you might find yourself learning very similar lessons to the ones R
assumes you know.
I have zero background on programming, so I prefer to work and learn in
C/C++ if I have a chance (and time). But if I need something quick, then
I will have to use something like matlab, R or python.
"Duke"<duke.li...@gmx.com> wrote:
On 9/16/10 5:00 PM, Rolf Turner wrote:
On 17/09/2010, at 8:51 AM, Duke wrote:
Hi Duncan,
On 9/16/10 3:47 PM, Duncan Murdoch wrote:
On 16/09/2010 3:40 PM, Duke wrote:
Hi all,
I am writing a function (fun.R), but I dont know how to code the
function so that the Help Text will be shown up when one types ?fun (of
course, after he loads it up). Anyone has any advice for me how to do
that?
The help text is separate from the function (unless you use the
roxygen package or similar). You need to write a package so that R
will find the help; instructions are in the Writing R Extensions manual.
I was expecting something simpler than writing a package, and that I can
integrate it into fun.R, but thanks anyway.
(a) Writing a package is not all that hard.
You can say so if you are fluent in R. I just started and have written
only 20-30 lines of codes so far. Also, writing a package is still more
complicated than writing a simple function (single file). Why R is so
different from other languages (python, matlab or more basics like C/C++
etc...)? In fact I still feel very uncomfortable with R, for example, I
hate when I type a function name, it shows the whole function.
Honestly I feel a world of programming is a mess, and it is tough when
one wants to jump from one language to another.
(b) It focuses the mind wondrously.
I did try to write a simple package (followed a tutorial), but did not
find what you said :). Maybe I need more practice.
(c) Using R CMD check on the package is very useful for picking the
lint off the code.
It would be great if you share your experience a little more about this.
Thanks,
D.
cheers,
Rolf Turner
######################################################################
Attention:
This e-mail message is privileged and confidential. If you are not the
intended recipient please delete the message and notify the sender.
Any views or opinions presented are solely those of the author.
This e-mail has been scanned and cleared by MailMarshal
www.marshalsoftware.com
######################################################################
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
