Count function calls

Hello. 
Another thing you may want to do depends on whether you are using
model="within" (the default) or model="random". 

In the first case, pvcm() estimates separate regressions, so you just
need to loop lm() on individual indices to spot where it fails.

In the second case, what you may want to do is try a similar estimator:
pmg(..., model="mg"), which is an unweighted version of Swamy's
estimator in pvcm() and a simpler function to read and modify, possibly
using the global assignment operator '<<-' as already suggested by
William to output diagnostics.

Best,
Giovanni

-----Original Message-----
From: r-help-bounces at r-project.org

[mailto:r-help-bounces at r-project.org] On Behalf

Of Simon Zehnder
Sent: Tuesday, February 26, 2013 2:53 AM
To: r-help at r-project.org help
Subject: [R] Count function calls

Dear R-users,

I have the following problem: I am running the function 'pvcm' from

the 'plm' Panel Data

package. Inside this function 'solve' is called and gives for a

certain individual data series

an exception because of singularity. I would like to know which

individual data series

causes this error. I tried to debug it, but this is truly painful, as

solve is called inside of

'lapply' and there are over 5,000 individual data series in the panel.

Now, what I would like to do is to count the calls to 'solve' inside

the function, so I can

see, where the function throws the exception. I tried to use 'trace'

with a count variable,

but I have no clue how to define a global variable to be used by trace

and updated at

every call.....is there another approach?


Best

Simon

______________________________________________

?
Ai sensi del D.Lgs. 196/2003 si precisa che le informazi...{{dropped:12}}