[http://www.scilab.org/images/scilab_logo_small.gif]

Scilab is a free Scientific Software Package and can be found at http://www.scilab.org

It is used for numerical computations in engeneering, statistics and for plotting graphs and such.

It has connection to Tcl via these functions:

   * ScilabEval - tcl instruction : Evaluate a string with scilab interpreter 
   * TK_EvalFile (obsolete, replaced by TCL_EvalFile) - Reads and evaluate a tcl/tk file 
   * TK_EvalStr (obsolete, replaced by TCL_EvalStr) - Evaluate a string whithin the tcl/tk interpreter 
   * TK_GetVar (obsolete, replaced by TCL_GetVar) - Get a tcl/tk variable value 
   * TK_SetVar (obsolete, replaced by TCL_SetVar) - Set a tcl/tk variable value 
   * close - close a figure 
   * figure - create a figure 
   * findobj - find an object with specified property 
   * gcf - gets the current active tksci figure 
   * uicontrol - create a Graphic User Interface object 
   * uimenu - Create a menu or a submenu in a figure

Scilab's help system is implemented using Tk.

----
GS (20120611) Here is a simple example for using Tcl-Tk with Scilab. There is no tclsh or wish in Scilab. 
Scilab evals commands with ScilabEval [http://help.scilab.org/docs/5.3.3/en_US/section_a10b99d9dda4c3d65d29c2a48e58fd88.html] function.

[http://gersoo.free.fr/wiki/f1036/sciguidist.jpg]

There is 3 files (run.sce, distance.sci, gui.tcl).

The Scilab TCL_EvalFile function is used to display the GUI which calls 
a Scilab function to recompute the distance (function distance()) 
each time sliders are moved.

To make a test, put these 3 files in the same directory,
run Scilab and change the working directory :

  cd <your Scilab directory>

Enter the command:

  exec ('run.sce')

and the GUI will display.

The file run.sce:

  // run.sce
  exec distance.sci;
  TCL_EvalFile('gui.tcl');

the file distance.sci:

  // distance.sci
  function dist = distance(x,y,z)
    dist = sqrt(x*x + y*y + z*z)
  endfunction

And the Tcl-Tk code:

  # gui.tcl
  global x y z dist

  set x 10
  set y 10
  set z 10
  set dist " "

  toplevel .w
  scale .w.scx -from 0 -to 200 -length 200 -resolution 1 -label "X" \
               -orient horiz -bd 1 -showvalue true -variable x \
               -command ComputeDistance
  scale .w.scy -from 0 -to 200 -length 200 -resolution 1 -label "Y" \
               -orient horiz -bd 1 -showvalue true -variable y \
               -command ComputeDistance
  scale .w.scz -from 0 -to 200 -length 200 -resolution 1 -label "Z" \
               -orient horiz -bd 1 -showvalue true -variable z \
               -command ComputeDistance

  label .w.lt -text Distance
  label .w.ldist -textvariable dist -bg lightblue
  eval pack [winfo children .w]

  proc ComputeDistance {w} {
    global x y z dist
    ScilabEval "dist = distance($x,$y,$z);TK_SetVar('dist',string(dist));"


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