Version 0.19
------------

Small changes to fit to the now default "new" figure
style (old figure style is selected in loader.sce). 

Version 0.18b1 (6/3/2003)
-------------------------

New installation system, with the two scilab scripts
builder.sce/loader.sce (see the README file)

Version 0.17 (18/7/2002)
------------------------

Bug fixes, and some new features (see the homepage)

Version 0.17b3 (20/02/2002)
----------------

A few bug fixes (see the homepage). 

Version 0.17b2 ()
-----------------

A few bug fixes (see the BUGS files)

Better error handling in the generation of the library.
Now the 'plotlib' variable, if it exists, is unprotected
and then cleared before the call to 'genlib'.

Version 0.17b1 (Thu Mar 15 15:57:47 CET 2001)
---------------------------------------------         

This version uses many of the new features of Scilab 2.6.
The state will remain 'beta' until the documentation
will be ready...

MAJOR ISSUES

- New colorbar positions (left, right, top, bottom (or bot))

- plot(x,f) where f is a function with the syntax y=f(x)
or [x,y]=f(t);

- New values for the color/marker string in 2D plots :
the strings '--' and '-.', which can be combinated with
other usuals characters, allow to make respectively dahsed
and dash-dot curves. Same behavior for plot3 (curves in 3D).

- New 'axis' property values in 3D functions (plot3,mesh, surf, ...) :
	* 'equal	(isometric plot)
	* 'vis3d' 	(isometric/non expanded plot)
	* 'box' 	(only the box without captions)
	* 'trihedral' 	(only the 3 small x/y/z axis)

- New allowed values for the 'view' property. When you specify

'view',V

    if V is a 2 x N matrix, then the graph is being represented
    successively for the view points V(:,i), i=1:N.

- New 'axis' property values in 2D plot functions (plot, pcolor, tripcolor)
        * 'left'	(the y axis is displayed on the left)
	* 'right'	(the y axis is displayed on the right)
	* 'center'	(the x and y axis cross at the center of the plot box)
	* 'origin'	(the x and y axis cross at the (0,0) point)
	
- New property for 2D plots 'grid', with the possible values
	* 'on' or 'off'
	* a 3-vector giving the color in RGB coordinates.

- Support of list arguments in plot, mesh, ... Example :

--> myOptions=list('background',[0 0 1],'axis','equal');
--> t=0:10; plot(t,sin(t),myOptions)

the list is expanded while the argument list is parsed, so
that the above line is equivalent to

--> t=0:10; plot(t,sin(t),'background',[0 0 1],'axis','equal')

MINOR ISSUES

- Now the 'xlabel', 'ylabel' and 'title' can be used as properties
in 2D plot functions. The 'title' property can be used in 3D
functions also.

- The font size used for tick labeling and labels now depends on
the window size (it already depended on the subplot state).

Version 0.16 (2000/12/17) bug fixes
-----------------------------------

Essentially bug fixes (installation under Windows
and pb with colormaps, see the BUGS file)

Version 0.15 (2000/7/7) new functions + man pages 
------------------------------------------------- 

New functions : 

- pcolor() and tripcolor() : pseudo-color 2D 
plot of rectangular or non-rectangular or triangulation-based 
patches. These new function will support interpolated shading 
with the next version of Scilab 

- whitebg() : to set the default color scheme of figures. This 
function existed for a while, but was not documented in the 
man pages (now it is). 

- caxis() : to set the color scale of pseudocolor plots 

- colormap() : to set the colormap of pseudocolor plots. Was 
mentionned in the man list but the man page was absent (this 
has been fixed) 

various Improvements : 

- the man pages for trimesh/trisurf/trisurfl has been 
improved. Now calls like trimesh() produce a demo plot, 
where the data are loaded from the file 

SCI/macros/plotlib/tridem.dat 

- A few bugs fixes

Version 0.14 (2000/5/18) automated installation 
-----------------------------------------------    

Automated installation via script
files.

Version 0.13 (04/05/2000) support for interpolated shading 
----------------------------------------------------------

- Added the property "hidden" for the mesh macro
The possible values are 'on' and 'off'. This allows to do fast wire frame
rendering

- Added support for the modified version of plot3d1 (interpolated shading)

In the macros surf, surfl, trisurf,
the property 'shading' can now take the value 'interp'. If your version
of plot3d1 does not support interpolated shading then an error message is 
given (should it be a warning ?).

To allow interpolated shading in plot3d1, you need to recompile scilab by
patching some files :

SCI/interf/matdes.f
SCI/routines/graphics/Plo3d.c
SCI/routines/graphics/Rec.c
SCI/routines/graphics/RecLoad.c
SCI/routines/graphics/RecSave.c

The patched/enhanced files can be find at the URL

http://www.dma.utc.fr/~mottelet/plotlib-related/patches

All the added code is driver-independent and so
the modifications apply for any driver (X11, Pos, 
Xfig, GIF, ...). For those who are familiar with
the source, all the modification are quoted and
well commented (to find the modified stuff, look
for the string "polpoth" -that's my nickname- in
the above mentioned files).

The code is not optimal, but the rendering
speed is more than correct, compared to what could 
have been done with a sci macro. 

Version 0.12 (04/02/2000) support for triangular mesh 
-----------------------------------------------------    

- Added 3 new functions, for plotting surfaces based on a triangulation : trimesh,
trisurf and trisurfl. The syntax is like in Matlab, and all the property/value
settings are the same as for mesh, surf and surfl.

Version 0.11 (01/13/2000)
-------------------------
	
- I added 'xlabel', 'ylabel ' and 'zlabel' properties for surf, mesh, surf and plot3d.

Version 0.1 (10/14/99) : a bunch of new stuff 
---------------------------------------------

 - Many rewriting and bug fixes, a big effort on documentation (help .cat files). Now 
each function is in a separate .sci file. The new release makes use of global variables 
so you have to upgrade to scilab 2.5 

- New functions (now some help can be obtained for all functions) 

legend() (for 2D plots) 

xlabel(), ylabel(), title() 

3D enhanced functions : 

plot3(), mesh(), surf(), surfl() 

with the classical Matlab syntax, and with the possibility of giving 
the surface values by a function (type help mesh). 

'colorbar' (a property name for the above functions) 

colormap() 

to change the colormap of 3D plots. 

Version 0.05 (04/22/99) : new functions 
---------------------------------------

- I have added some functions to make plots with a log scale 

semilogx() 
semilogy() 
loglog() 

The syntax is the same as the function plot() i.e. try the commands 

w=logspace(-1,2,500); 
s=%i*w; 
g=1../(s+1); g2=1../s; 
loglog(w,abs(g),w,abs(g2)) 

- I have also added the function 

gcf() 

which returns the number of the current active window. 

Version 0.04 (03/30/99) : new functions 
---------------------------------------

- I have added a hold() function. Can be used with the arguments `on' or 'off' like this 

hold on 
hold off 

or without arguments 

hold() 

in this case the hold state toggles between on and off. 

- xlabel(string) 

Puts a label below the X - axis. You may wonder why I did not do something 
for the Y - axis : the problem is that the angle modifications which are posssible 
in the xstring macro affect *each* character, and not the whole string ! The result 
is unreadable (to me). Until now, I dit not find a solution. 

- axis() 

This function in only callable without arguments. The call 

vect=axis() 

returns the current axis limits with the Matlab convention i.e. 

vect=[xmin xmax ymin ymax] 
  

Version 0.03 (03/24/99) : some crucial ameliorations (printing) 
---------------------------------------------------------------

- The printing problem has been fixed. Now printing and exporting in 
b/w mode produces correct results. 

- Pretty axis graduations is now the default mode. It can be deactivated 
by an 'axis','tight' clause in a plot command. 

- New markers 't' for trefoil and 'f' for filled diamond 

- New functions : 

    - delete() or delete(win) for properly deleting a window. 
    - title(string) to add a title to the graph. 
  

Version 0.02 (03/23/99) : many bug corrections and ameliorations. 
-----------------------------------------------------------------

- Matlab look and feel with a ``fancy frame'' around the plot. 
- No need to call initCmap() any more at startup. New colors are added 
  automatically with the scilab command ``addcolor()''. Anyway you still 
  have to call graphinit() once at startup (see below) 

- New syntax for graphinit : 

graphinit() 
graphinit('whitebg') 
graphinit('blackbg') 

The choice 'whitebg' or 'blackbg' determines the default background/foreground 
combination, black/white for 'blackbg' and white/black for 'whitebg'. The switch 
can be done later with the functions whitebg() and blackbg() 

- New functions (with call example) 

fig() : creates/activates a window 
fig('background',[0 0 1],'foreground',[1 1 0]) 
fig('colormap','hot') 
fig('colormap',[0 0 0;1 1 1]) 
fig(winNum) 
fig(winNum, 'background',[0 0 1],'foreground',[1 1 0]) 

Properties can be changed after window creation 
  

Version 0.01 (03/19/99) : initial release 
------------------------------------------

Don't expect all this to work if you don't call graphinit() 
 once at the beginning of your session. You have also to call 
 initCmap() each time you create a new window in order to get 
 the correct colors when you specify it in plot() call. 

Like in matlab the function plot() can accept any number of input arguments. The 
usual way is to use pairs or triples. Here is an example session : 

 graphinit() 
 initCmap() 

 t=linspace(0,2*%pi); 
 plot(t,cos(t),t, sin(t)) 
 plot(t,cos(t),'r',t,sin(t)) : red line for the cos 
 plot(t,cos(t),'ro',t,sin(t),'y^-') : red dots for the cos and yellow 
                                     triangles + solid line for the sin 
 plot(t,[cos(t);sin(t)]) : color cycling is like in matlab 

 plot(cos(t),sin(t),'axis','equal') : example of property/value setting 
 plot(cos(t),sin(t),'axis',[0 1 0 1]) : another example the axis vector is 
                                        [xmin xmax ymin ymax] 
  

 plot(t,cos(t),'3r') : red line, set the linewidth to 3. 
                       Linewidth up to 9 are allowed. 

 You can also experiment the subplot() function : 

 subplot(2,1,1); plot(t,cos(t)) 
 subplot(2,1,2); plot(t,sin(t)) 

 You can also use the clf() function to properly clear a graphic 
 window. 

 I have made a big effort to produce explicit error messages when the function 
 detects something wrong in the argument list, so don't be affraid to test 
 any combination of couple, triples and property/value pairs that seems 
 correct. Feel free to report me any bugs and/or sugggestion 

//////////////////////////////////////////////////////////////////////////////// 
// 
// available markers // available colors (in cycling order) 
//                   // 
// 'o' circle        // 'y' yellow 
// '+' plus          // 'm' magenta 
// '*' star          // 'c' cyan 
// 'd' diamond       // 'b' blue 
// '^' up triangle   // 'g' green 
// 'v' down triangle // 'r' red 
// '.' dot           // 'w' white 
//                   // 'k' black 
//                   // 
//////////////////////////////////////////////////////////////////////////////// 
// 
  
