R help - Mar 2008 - parmat error from MASS?

i'm in the midst of using R for a PVA/matrix project. my math skills are 
lousy and programming skills are worse. to deal with an error that i 
couldn't solve, i changed a parameter that used a new part of a routine 
in our PVA package's code:

else if (ES == "ParDraw") {

        require(MASS)


(previously, ES was "MatrixDraw" and MASS wasn't called for)
now, i get the following error:

Error in apply(parmat, 1, mean) : dim(X) must have a positive length


there is no code in the PVA package routines that has a line that says 
"apply(parmat, 1, mean)" or parmat or the format "(____, 1,
mean)".
that's why i think the error has something to do with MASS. i tried to 
update MASS, but had problems with that. i've searched for parmat. i 
looked through the MASS documentation for parmat. i don't know what it 
is or how to change whatever is affecting parmat.

i'm using RGui from version 2.6.0 on an XP machine.

sincerely,
john

There is no such code in MASS, so please don't make random assignments of
blame.  A competent R author would have used rowMeans(parmat).

R has debugging tools (see 'Writing R Extensions') and you should use
them
to locate in which function the error is occurring.  E.g. traceback() 
would tell you.  Even then, the error is almost certainly in the data 
passed to the function and not in the function itself.

We don't know what the PVA package/project is, or who 'our' refers
to --
despite the posting guide you have not given a signature block.


On Mon, 10 Mar 2008, john polo wrote:
> i'm in the midst of using R for a PVA/matrix project. my math skills
are
> lousy and programming skills are worse. to deal with an error that i
> couldn't solve, i changed a parameter that used a new part of a routine
> in our PVA package's code:
>
> else if (ES == "ParDraw") {
>
>        require(MASS)
>
>
> (previously, ES was "MatrixDraw" and MASS wasn't called for)
> now, i get the following error:
>
> Error in apply(parmat, 1, mean) : dim(X) must have a positive length
>
>
> there is no code in the PVA package routines that has a line that says
> "apply(parmat, 1, mean)" or parmat or the format "(____, 1,
mean)".
> that's why i think the error has something to do with MASS. i tried to
> update MASS, but had problems with that. i've searched for parmat. i
> looked through the MASS documentation for parmat. i don't know what it
> is or how to change whatever is affecting parmat.
>
> i'm using RGui from version 2.6.0 on an XP machine.
>
> sincerely,
> john
>
> ______________________________________________
> R-help at 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.
>
-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Rerun your code and as soon as the error occurs type:
 
> traceback()
 
This will show more information on where the error is actually occuring.  If
this does not clear it up for you, then send more of an example of what you are
doing along with the output of traceback (see the link at the bottom of all
r-help messages for more information on heow to get good answers from the group)
and we may be better able to help.

________________________________

From: r-help-bounces@r-project.org on behalf of john polo
Sent: Mon 3/10/2008 5:25 PM
To: r-help@r-project.org
Subject: [R] parmat error from MASS?



i'm in the midst of using R for a PVA/matrix project. my math skills are
lousy and programming skills are worse. to deal with an error that i
couldn't solve, i changed a parameter that used a new part of a routine
in our PVA package's code:

else if (ES == "ParDraw") {

        require(MASS)


(previously, ES was "MatrixDraw" and MASS wasn't called for)
now, i get the following error:

Error in apply(parmat, 1, mean) : dim(X) must have a positive length


there is no code in the PVA package routines that has a line that says
"apply(parmat, 1, mean)" or parmat or the format "(____, 1,
mean)".
that's why i think the error has something to do with MASS. i tried to
update MASS, but had problems with that. i've searched for parmat. i
looked through the MASS documentation for parmat. i don't know what it
is or how to change whatever is affecting parmat.

i'm using RGui from version 2.6.0 on an XP machine.

sincerely,
john

______________________________________________
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.



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