MATH AND STATISTICAL COMPONENT

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Adding lines to a Graph

Hi, 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, PPR

contolling the axes boundaries

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? Torehan

Scilab 5.x Performance

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 performance is about 50% of the 4.1.2 version! For me this is like saying you cannot run these simulations. Some of my performance evaluations takes a week to run with the 4.1.2 version assuming nothing else crashes. My question is will Scilab ever return BACK to its old performance or is it doomed? I like Scilab and not very interested to find an alternative. Moti

Kronig - Penney Model with Scilab

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 8th Ed.) In order to obtain these figure I have created a .sci script file. Here is the script... m=9.10938188e-31; hbar=1.05457148e-34 ; eV=1.60217646e-19; Vo=10*eV; e=[0:0.01:10]; E=e*eV; a=5.0e-10; b=1.5e-10; t=a+b; funcprot(0) function alpha=alpha(E); alpha = sqrt(2*m*E)/hbar; endfunction function beta=beta(E); beta = sqrt(2*m*(Vo-E))/hbar; endfunction function

code generation embedded coder with scicos

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 which has the operatingsystem uclinux. -how can i get a makfile for unix, while i am working with windows? -and where can i find the template makefiles for the generated make files. -how can i get only the c code without that object file appear, that means without the compiler generate these object files, because in simulink i could get only the c code and then make the whole proj

Color of surface plot

Hi, 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 change the color to white or to transparent (only the line visible)? Tank you very much!

3D plot

Hello, I'm generating a CSV file for a digital elevation model. It works fine but I'd like to plot 3D plots (not surface) in Scilab to check the generated file. I haven't the finest idea how to do it. plot3d draw a surface but my X,Y vectors are not monotone An idea could be to draw dots (points) instead of surface in a 3d space I have a look at param3d but it draws curve in 3d space... not dots ! How could I achieve this : here is the code : // Generation du maillage d'un terrain // definition d'un profil et extrusion clear xmin = 0; xmax = 100; ymin = 0;

C Implementation of IfThenElse/ESelect in Scicos

Hi all, during implementation of a Scicos block to read sensors, I came across the problem to handle errors. So it would be a good idea to rise output events in case the Scicos block detect any error (e.g. the sensor is disconnected). But I have no glue how to implement an synchronous output event (the block already have an input event as trigger) in C. I tried to reverse engineer the IfThenElse an ESelect blocks, but they are written in Fortran and I was not able to transfer this to C. So here are my questions: 1. What to put into a *.sci file to get an output event and still be ab

Excel time format conversion

Hello All! I'm still quite a n00b to scilab, and am looking for a way to convert the "hh:mm:ss" excel format into a proper number, ie "hh.mmss". Heck, even three numbers "hh" and "mm" and "ss" would do the trick! At the moment all I am getting is rows and rows of NaN.... Is there a command / does anybody know a trick? Thanks in advance! Chris

AutoTick and subplots

plot([1,2,4,5],[1,4,16,20],`ro-') Produces y-ticks at 0:2:20 and x-ticks at 1:0.5:5 But the much smaller graph subplot(2,2,1) plot([1,2,4,5],[1,4,16,20],`ro-') Has the same tickmarks but half the space, not as pleasing. I know how to manually change the tickmarks via a = gca() to change the xticks and yticks but it is hardly automatic. is there a way to get auto_scale to cut the number of ticks in half? -- Steven Bellenot http://www.math.fsu.edu/~bellenot Professor and Associate Chair phone: (850) 644-7405 Department of Mathematics

scilab editor

hi, 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. do you know if futur scilab releases will have debug functionalities? do you know if it's possible to add menus on basic editor to add debug point on one ligne of script ?

Updating file

Hi, i am a new Scilab user and i need a little help... What I am trying to do, is: open a file with mopen(filename,"r+") and then read and write different lines in this file with mputl and mgetl. The problem is: when trying to write a line, mputl always fails. As I understand "r+" opens a file in update mode, so that i can do both inputs and outputs. This is probably a very simple problem, but I still need help. Thanks, Piet

compile a scilab function

hi, could someone explain me how to compile a scilab function to speed up its execution time ? is it possible? how? thanks a lot

Modelicac Open Source?

hello list, I am interested in Modelica compiler.I've read that in ScicosLab is used an open source Compiler with Name modelicac. Now I am looking to the sources. Unfortunately, them I did not found on the website. Can someone give me a hint where the sources to the compiler are provided.In ScicosLab only a binary source is attached. Regards Willi

how can I deal with the Chinese problem in Scilab 5.2

It seems that the Chinese character cannot be displayed properly in Scilab 5.2, how can I deal with it? Is the same way as it is in Scilab 5.1 feasible?

Scicos/modelia initilization problem on Windows 7

Hello, I have installed Scicoslab 4.4 and Visual C++ Express edition on Windows 7 in order to run modelica simulations (like the RLC circuit of the scilab demo) and I get the following problem: " Initialisation problem The modelica block returns the error: scicosim: unknown block: RLC_circuit_sim " I guess this is a Windows 7 related problem because it works smoothly on XP or Linux. Any suggestion where the problem could come from / how to debug? Thanks Fabian

Scilab internals

Hi, I've got a question concerning the Scilab internals. I saved a block diagram as Interf func (i.e. as ASCII-file) and I have some problems to understand the code. Why are some objects saved as scs_m_1 and some as scs_m_2? What's the background of that? I think all blocks of the block diagram are saved in scs_m_1.objs, is that correct? Here is a little example: scs_m_1=scicos_diagram(.. version="scicos4.3",.. props=scicos_params(.. wpar= [-60.392472,534.04133,69.597225,421.46172,810,481,37,0,736,481,25,25,1.4],.. Title=["PT1Sc

Text in graphs

I am trying to write some text in my graphs and found the xstring command. The coordinates for this command are in my "data"s coordinate system so it is easy to write text related to data. The problem arise when I want to draw text at a specific position on the graph, For instance 1 cm from the left edge and one cm above the bottom edge. Is there another string command to write text in the figure? /Anders Sneckenborg

CPU Load: leastsq

Hi all. I am using leastsq to do some optimisation; however, it seems to run very slow on my computer. The CPU load remains at about 12% while it runs. It takes a fair while to complete, and if it is possible to use more CPU I would certainly like that. I searched the group and found the most recent discussion of dual core processors was 2007 and that the libraries used at that time can only see one core so the CPU load was already 50% of the total. Does a 13% CPU load for an optimisation run sound correct? Is this a known CPU/OS/Scilab thing, or is it more likely my error funct

Menu + submenus in the console

Hi, I need to create a menu with submenus on the console's menubar, like for the Preferences/Colors item that proposes 2 sub-items Background | Font. addmenu() looks the only way for creating menus in the console, unless there is a console handle that could be use with uimenu(). How is it possible to retrieve the console's handle ? Or what's the syntaxe with addmenu() to create items with sub-menus ? Thanks for any hint. Samuel

Bad behaviour of Xcos in Scilab nightly build.

Hi all, I've just downloaded the nightly build of Scilab, installed it on Windows XP and tried to run an XCos session. This error came out: Scilab has found a critical error (EXCEPTION_ACCESS_VIOLATION) with "scicosim" function. Save your data and restart Scilab. After this, Scilab turns unusable (no commands do anything) and must be killed with Task Manager. Best wishes

Code Completion

Hi Fols, can anyone suggest a development environment that will perform code completion of Scilab objects ? ie ObjectName.(list of member functions) thanks and Merry Xmas David

ScicosLab 4.4-beta has been released

ScicosLab is a free distribution of Scilab/Scicos, based on Scilab4,used primarily for implementing toolboxes developed in the Metalau project at INRIA and ENPC such as Scicos and Maxplus, and Scipad. ScicosLab is not supported by the Scilab consortium, and it is based on GTK GUI under Linux and Mac, and native toolkits under Windows. ScicosLab is available in source and binary formats for most Linux, Mac and Windows platforms (www.scicoslab.org, www.scicos.org). The 4.4-beta version is made available for Windows, and will be available in the coming days for Mac and a few Linu

Only LCC and MSVC are the accepted C compilers?

Colleagues, Scilab 5.1.1 doesn't find DJGPP in Windows XP, despite it's a registered resource (PATH and all that). Are LCC and MSVC the only ones accepted as C compilers? Best regards.