debugging functions in R

Wow, thanks Justin and Liviu,

DebugOnce and browser. great!

Eran

On Wed, Aug 24, 2011 at 5:34 PM, Justin Haynes <jtor14 at gmail.com> wrote:

Another great tool is debugonce()

wrap your function name in it and then execute your function call.

debugonce(my.function)

out<-my.function(df)

And you'll be brought into the same interactive browser. (its Vi if im not
mistaken which can take a little getting used to.)


Justin



On Wed, Aug 24, 2011 at 7:29 AM, Liviu Andronic <landronimirc at gmail.com>wrote:

On Wed, Aug 24, 2011 at 4:20 PM, Eran Eidinger <eran at taykey.com> wrote:

Hi,

I am not sure if this is the right list to ask this question (though I

did

not find a more appropriate one).
I've started using R a month ago, and small scripts work fine. However,

when

I start writing more complex code, it gets messy.

1. Is there any way to debug "normally", with breakpoints?

fortune('browser')

My solution when I run into mysteries like this is to put 'browser()' in
the
function just before or after the line of interest. The magnitude and
direction
of my stupidity usually become clear quickly.
? -- Patrick Burns
? ? ?R-help (February 2006)


Use browser() to inspect the environment and execute the code one step
at a time.
Liviu

2. I am using the Eclipse plugin (StatET), and tried JGR(). Is there an

IDE

that enables breakpoints?
3. Is there an equivalent to "include" in other programming languages?

So

many functions in one file are very messy. I would like to break it to
several files.
4. Any way to create a "local" context of variables inside a function?
Otherwise I have to be careful to give different names inside functions,

to

those in the workspace.

I should point that I am a long time Matlab user and am probably

expecting

some things that don't necessarily exist in R...

I know it's a lot, if there is a more appropriate forum to ask these,

please

point me in that direction.

Thanks,
Eran.

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