Math Forum / Math Software / Scilab / December 2008

When I try to create a bode plot of a simple second order system as:
s = poly(0,'s')
P = s/(s^2+1e6)
h = syslin('c', P)

I'm writing a Kalman filter application that involves going through big
piles of data.  The Kalman filter itself has numerous intermediate steps
to simulate the plant, which in turn has embedded calculations using
quaternions, for which I had to work up a Scilab data type.

I have a questionabout dividing into 1.
I have a simple vector n=[0:1:2]  I wish to multiply n by 2, add to 1
and divide the result into 1 as in c=(1)./(2.*n+1) this gives me the
correct result of c= 1.    0.333333  0.2

I have a very basic question that I haven't been able to find an
answer to online. Am new to SCILAB, and am running it on both a
Windows (Vista) and a UNIX system. I have an .sce file that I am
trying to execute within the terminal (in both these OS's) - and am

I've just seen a release notice for scicoslab.  Can anyone tell what
is going on here?  A post from Delebecque Francois on this forum
states that scilab is no longer being developed at INRIA?  scilab 5.0
was just released.  And what is scilabGTK?

Does anyone know how to change fonts and screen colors in scilex?

In the change from Scilab 4.xxx to 5.0.x, the tick marks that pop up
automatically with plot2d are no longer "rational" -- i.e. they no
longer show up as nice even numbers like -2, 0, 2, etc.
Is there a way to make this happen without a bunch of hand work?

I am a newbie in Scilab, some more experience in Matlab, but always
been sub average in graphics even in Matlab.
I am plotting irregularly spaced  experimental results using surf
with  3 matrices 96x383, X, Y, Z.

Some library and help files were missing in the ScicosLab 4.3 Linux and
Mac package distributions. New packages have been made and can now be
downloaded from www.scicoslab.org. This is not a new release.

Subject line IS correct ;)
This started with running a Tcl script  [to display some plots using
Gnuplot] from Scilab like a normal person. I wondered if I might improve
the human interface by using Tcl as the top level script. Another

I have big troubles trying to add help chapters to the scilab help.
The help chapter dosn't show up.
I have used the methods described in the Wiki Create a toolbox at
http://wiki.scilab.org/howto/Create_a_toolbox.

ScicosLab
ScicosLab is a free environment for scientific computation similar in
many respects to Matlab/Simulink, providing Matlab functionalities
through Scilab 4, and, Simulink and Modelica functionalities via Scicos.

How does one get access to a global variable (a large
image array) defined in Scilab  from a C function?
I don't want to data to be copied each time the function is called,
and I'd like to be able to modify the data w/in the C and have the

Where are all source files for SCILAB?
Thanks,
DSPonFPGA

I usually use xs2eps to save my figures to be imported in TeX
documents. It works almost fine for Scilab 4.1.2 under Kubuntu 8.04
Now I'm experiencing a problem with an image plotted using the IMAGE
toolbox and with the following lines: