> Hi everyone: > I wrote a R program which has loops. When I run the program, it > crashed. I would like to identify in which loop the pragram crashed, how > can I debug ? I'm new to R, could somebody please give me a general idea > about debugging in R.(I'm a C/C++ programmer and have general knowledge > about program debugging.) > Thank you! > > Best, > > Feng >
> Hi everyone:Please, refer to the chapter 9 of the "R language definition" ($R_HOME/doc/ manual/r-lang.pdf) The simplest way is using print() functions. Besides the debugging functions described in the manual, you can use the very powerful package debug, developed by Mark Bravington.> I wrote a R program which has loops. When I run the program, it > crashed. I would like to identify in which loop the pragram crashed, how > can I debug ? I'm new to R, could somebody please give me a general idea > about debugging in R.(I'm a C/C++ programmer and have general knowledge > about program debugging.) > Thank you! > > Best,
On Loops:
The "apply" coomands are better, faster than loops. If there are lots
of loops or nested loops then you should be able to replace some of the
loops with an apply command. If you have nested loops I'd recommend
replacing loops on the inside first.
R seems better designed using the apply commands.
It seems to be optimized for memory usage.
I found this especially true when I was doing numerical analysis and/or
boot strap types of things.
Quotes from help:
Description:
Returns a vector or array or list of values obtained by applying a
function to margins of an array.
good luck
> I wrote a R program which has loops. When I run the program, it
> crashed. I would like to identify in which loop the pragram crashed,
how > can I debug ? I'm new to R, could somebody please give me a general
idea > about debugging in R.(I'm a C/C++ programmer and have general
knowledge > about program debugging.)
> Thank you!
>
> Best,