Just to finalize the previous discussion. I have made the decision
that I will focus on using python for numerical computations. My
decision is based on the fact that
A: it is using python rather than it is own obscure language
B: nicer graphics although 3D requires other python libraries
C: it has functions for reading SEG-Y data and also deconvolution
functions
D: help function and function descriptions in Scilab are horrible and
forums/mailing lists are not really effective.

However to be honest, I have to admit that I have uninstalled Sage and
just installed the Numpy, Scipy and Matlibplot only. Sage is becoming
massive. The download is about 300MB and I recall that after unfolding
it occupies a space of 800MB. Compare this with the 15MB of Scilab!!!
Although it might seem to make Sage very powerful, I think I would not
use 99.5% of the possibilities Sage offers and actually wasting
computer resources.

Francis


On Jul 7, 5:22 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Mon, Jul 7, 2008 at 9:09 AM, Francis <[EMAIL PROTECTED]> wrote:
> >...
> > At the moment I keep working with Scilab since I can work with it
> > without learning to much new things, but I have spend some time using
> > Sage and if Scilab 5 does not show the improvements I would like to
> > see I probably lean very hard towards Sage.
>
> > By the way it has been mentioned several times on Sage websites that
> > Scilab is not open source in the true meaning of the word. If you read
> > the license agreement carefully you will find that commercialization
> > of the code requires authorization i.e. you can't use the code to
> > create your own Matlab/Mathematica to sell it to consumers and any
> > derived/composite versions need to say copyright Scilab Enri (or
> > something like that). Is that a big deal ...
>
> Yes.  These discussions were usually in the context of why Sage doesn't
> somehow work closely with the scilab project (e.g., building on top of it).
> The license for Scilab is not GPL compatible so it is illegal for Sage to
> build on the work of Scilab.    My understanding is that this may change
> in the next version of Scilab.
>
> > I guess I am rambling a bit, but in conclusion: Scilab and Sage are
> > different packages with each pros and cons, both seem to have a good
> > foundation (from community and government) and will be around for the
> > coming years and maybe decades. Physicists/engineers probably will
> > prefer Scilab whereas Scilab is not really an option for
> > mathematicians. As physicist I have to acknowledge that Sage has some
> > good trump card and if Scilab does not improve I will really consider
> > using Sage for professional use rather than just interest.
>
> There are a lot of people in the "numerical Python" / numpy / scipy community
> who work is all in Sage.  This conferencehttp://conference.scipy.org/has very
> good participation.  Sage definitely aims to one day be a viable alternative
> to Matlab.   We care about the physicist and engineer users.
>
> If you do switch to Sage, please consider (re)writing some of our 
> documentation
> to be more engineering friendly.
>
>  -- William
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