Re: package nan warnings

[Alois Schloegl]

On 2012-08-02 21:42, Yin, Yue-Jun wrote:
> Alois,
> Thank you. I got your point about the agreement issue.
> What is the consequence of shadowing?

"Shadowing" occurs when there are two functions within the path. When 
calling such a function, the first in the path will be used and the 
second one is not accessible.


> The performance is enhanced or the other way?

My understanding is that shadowing per se does not have any significant 
influence on the performence. However, the different implementations 
might differ.

The idea of the NaN-toolbox is that missing values encoded as nan's are 
"ignored" or skipped. For statistical functions, this is the behavior 
you typically want. Internally, it requires an additional check for 
isnan, which can cause some performance penalty. However, the 
NaN-toolbox does also some smart data handling such that these effects 
are mitigated. However, the user of NaN-toolbox gets a proper answer, 
even if some values are missing, he/she does not need to worry about how 
to deal with missing values, and perhaps get it wrong.

Alois


> Regards
> yuejun
>
> -----Original Message-----
> From: Alois Schloegl [mailto:address@hidden
> Sent: Thursday, August 02, 2012 2:54 PM
> To: Carnë Draug
> Cc: Yin, Yue-Jun; address@hidden; Octave Forge
> Subject: Re: package nan warnings
>
> Version 2.5.6 (available from here:
>     http://pub.ist.ac.at/~schloegl/matlab/NaN/
> fixes the "mexext: Command not found" message.
>
> As Carne pointed out, I cannot do anything about the warning on shadowing core 
> functions without agreement of the octave maintainers.
>
>
>      Alois
>
>
>
>
> On 2012-08-01 23:13, Carnë Draug wrote:
> > On 1 August 2012 19:11, Yin, Yue-Jun<address@hidden>   wrote:
> > > Hi all,
> > > I got these message when I install nan package
> >
> > the nan is a package therefore it's not part of the octave project.
> > It's part of Octave Forge so I'm sending this e-mail to that mailing
> > list. Also, it's author and maintainer is Alois Scholoegl to whom I'm
> > also sending this e-mail.
> >
> > > octave:3>   pkg install C:\Users\i50230\Downloads\nan-2.5.5.tar.gz
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> > >
> > > make: Entering directory `/tmp/oct-2/NaN/src'
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> > >
> > > make: /usr/local/MATLAB/R2010b/bin/mexext: Command not found
> >
> > I believe this is related to
> > http://gnu-octave-repository.2306053.n4.nabble.com/Re-strange-message-while-installing-tsa-4-2-4-tar-gz-package-td4647905.html
> > and which has been reported at
> > https://sourceforge.net/tracker/?func=detail&aid=3552548&group_id=2888&atid=102888
> >
> > > tron.cpp:1:0: warning: -fPIC ignored for target (all code is position
> > > independen
> > >
> > > t)
> > >
> > > linear.cpp:1:0: warning: -fPIC ignored for target (all code is position
> > > independ
> > >
> > > ent)
> > >
> > > linear.cpp:2111:13: warning: unused parameter 'prob'
> > >
> > > svm.cpp:1:0: warning: -fPIC ignored for target (all code is position
> > > independent
> > >
> > > )
> > Could
> >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\center.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\cor.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\corrcoef.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\cov.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\detrend.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\iqr.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\kurtosis.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\mean.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\meansq.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\median.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\moment.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\normcdf.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\norminv.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\normpdf.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\prctile.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\quantile.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\range.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\ranks.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\skewness.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\spearman.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\std.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\sumsq.m shadows a built-in function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\tcdf.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\tinv.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\tpdf.m shadows a core library function
> > >
> > > warning: function
> > > C:\Octave\Octave3.4.3_gcc4.5.2\Octave3.4.3_gcc4.5.2\share\octa
> > >
> > > ve\packages\nan-2.5.5\var.m shadows a core library function
> > >
> > >
> > > Any idea how to get rid of them? Regards,
> >
> > The nan package does shadow (replaces) all those core functions. Do
> > you understand what that means? And no, it's not possible to remove
> > those warnings other than changing the octave source.