Math Forum / Math Software / Scilab / February 2010

How can I control the boundary of the y axis? I mean my actual data in
range of -5 and 30 but I want to be showed in the graphic window
between -10 and 10.
is it possible?

I'm a newbie on Scilab and please don't mind if I ask some silly
questions.
I'm trying to reproduce some band structure figures using Kronig -
Penney model (Kittel Chapter 7, Introduction to Solid State Physics

I'm new to scilab and I need to know how to add a vertical line to a
graph. For example, I want to graph a vertical line at x=2 on the
graph of a sinusoid. How do I do this?
Thanks,

How would I start windows executable application,
am I supposed to use the unix, unix_g or unix_w to do that ?
In Scilab 5.x, would unix('my_program.exe') start the windows
executable (I have win XP) ?

I fell in love with the net and all the compuiter teahcnology in the very early years and have loved it ever since, I have an IT Degree and Communications degree and will be working on my doctorate for the next five years, in bwetween I design websites, databases, Multimedia ...

Can I get some advice about non-linear curve fitting of ordinary
differential equation which can be shown as below.
Example:  dx/dt=k1*f(x)/(1+k2*f(x))
I need to solve the ‘k’ values to fit the simulation curve to the

Hi Scilab,
I know this subject came up here but the question is still unanswered.
After installing the latest Scilab release (5.2.1) and running one of
my performance simulations I found out that the new version

I am a regular user of scilab. I need to plot a lot of Mohr's circles
(for 2D state of stress), where scale of x and y axis must be equal.
In matlab there is 'axis equal' command, to be used after plot
command. Is there any scilab equivalent or any other trick to achieve

I am trying to print some numbers in octal format, which I should be
able to do by using msprintf. At least that´s what the help entry for
printf_conversion says.
But unfortunately, when I try this, I get told, that the '%o' format

Hi dear Scilab Specialists :)
I developed my own C block for computing some behaviors of heat exchangers.
Now I trying specify this model by implementation of function XSteam (
http://www.scilab.org/contrib/index_contrib.php?page=displayContribution&fileID=1024

How can I define a 106 dimesional vector with same values for each
dimension? Is it possible in Scilab?
Thanks
Torehan

on previous releases there was an editor "scipad" which had a lot of
functionnalities. on relaese 5.2.0, scilab editor is a basic editor.
scipad had functionalities for debug scripts and functions. to my
mind, it's essential to have debug functionalities to develop code.

Geetings!
I am looking for a package that solves Hamilton bellman jacobi pde
for closed-loop optimal control. Any pointers on tthis will be
appreciated.

Hallo all,
i have some quistions about code generation with scicos.
my operating system is MS windows XP and i am using scicoslab 4.4.
well i want to generate C code for the micro controler blackfin 561

I'm plotting a surface with the following command:
surf(x1,x2,ones(length(x1),length(x2)).*4.5)
I've read the help system over and over, but I don't understand how to
controle the color of the surface. Could anyone please explain how to