Hi everyone,
As part of another project, I completed a rudimentary Python binding
to Thorsten Joachims' SVM-Light library (http://
svmlight.joachims.org/) implementing a Support Vector Machine. My
source code is available at
http://bitbucket.org/wcauchois/pysvmlight
Are there people doing ML res
On Tue, May 4, 2010 at 11:11 AM, William Cauchois wrote:
> Hi everyone,
>
> As part of another project, I completed a rudimentary Python binding
> to Thorsten Joachims' SVM-Light library (http://
> svmlight.joachims.org/) implementing a Support Vector Machine. My
> source code is available at
>
>
Hello, William.
You wrote 4 мая 2010 г., 22:34:58:
> Could you write a little more to sage-devel about why mathematicians
> might care about "support vector machines" -- it's possible that most
> people reading this have never heard of them.
Being sage-devel reader for a while I may say tha
On Wed, May 5, 2010 at 12:42 AM, Sergey Bochkanov
wrote:
> Hello, William.
>
> You wrote 4 мая 2010 г., 22:34:58:
>
>> Could you write a little more to sage-devel about why mathematicians
>> might care about "support vector machines" -- it's possible that most
>> people reading this have never hea
Hello, William.
You wrote 5 мая 2010 г., 16:43:39:
> Yes, numerical analysis is definitely really, really needed in Sage.
> In fact, it is likely to be by far the most important part of Sage in
> the long run.
Ithinkthat I should look in this direction... I hope to
implement Pyth
On Thu, May 6, 2010 at 10:55 PM, Sergey Bochkanov
wrote:
> Hello, William.
>
> You wrote 5 мая 2010 г., 16:43:39:
>
>> Yes, numerical analysis is definitely really, really needed in Sage.
>> In fact, it is likely to be by far the most important part of Sage in
>> the long run.
>
> I think th
Hello, William
by the way, what do you think about using in SAGE both double and
multiple precision versions of ALGLIB?
I have fully functional multiple precision version of ALGLIB which
relies on MPFR for floating point computations. It includes multiple
precisionlinear algebra,
On Sat, May 8, 2010 at 1:40 AM, Sergey Bochkanov
wrote:
> Hello, William
>
> by the way, what do you think about using in SAGE both double and
> multiple precision versions of ALGLIB?
>
> I have fully functional multiple precision version of ALGLIB which
> relies on MPFR for floating po
Hello, William.
> My first thought is that it would be *awesome* to have _efficient_
> multiprecision linear algebra, etc., in Sage.
> This is the sort of thing people expect from Sage, but are often
> disappointed to find that we don't have.
As for the efficiency, I may say that perf
Hi Sergey,
On Sat, May 8, 2010 at 10:13 PM, Sergey Bochkanov
wrote:
> (3) - OOP overhead. Multiple precision ALGLIB makes use of OOP to
> implement multiple precision expressions like "x=y+z". However, it
> leads to excessive creation of temporaries, so I will replace OOP by
> somethin
Hello, Francesco.
> Just FYI, you might want to look into C++ expression templates - they
> might allow you to retain the convenient notation with no overhead.
I know about expression templates, but even with templates sometimes
creation of temporary is the only way to calculate value of a com
Hi Sergey,
On Sun, May 9, 2010 at 10:15 AM, Sergey Bochkanov
wrote:
> Hello, Francesco.
>
> I know about expression templates, but even with templates sometimes
> creation of temporary is the only way to calculate value of a complex
> expression like "x = ((a+b)*(c+d)-e)/(f+3)". Am I wrong
Hello, Francesco.
You wrote 9 мая 2010 г., 20:06:24:
> If the expression is to be intended like this:
> for i in (0,size):
> x[i] =((a[i] + b[i]) * (c[i] + d[i]) - e[i]) / (f[i] + 3)
> (i.e., element-wise), then I'm pretty confident expression templates
> could eliminate all temporaries.
I am
Hi Sergey,
On Sun, May 9, 2010 at 7:32 PM, Sergey Bochkanov
wrote:
> I am talking about non-vectorized form of the expression. And I can't
> imagine how (a+b)*(c+d) can be calculated without temporaries :) Can
> you give an example?
My bad, for some strange reason I had assumed we were talkin
On Tuesday 04 May 2010, William Stein wrote:
> On Tue, May 4, 2010 at 11:11 AM, William Cauchois
wrote:
> > Hi everyone,
> >
> > As part of another project, I completed a rudimentary Python binding
> > to Thorsten Joachims' SVM-Light library (http://
> > svmlight.joachims.org/) implementing a Sup
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