(maxima.info)Introduction to draw

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53.1 Introduction to draw
=========================

'draw' is a Maxima-Gnuplot and a Maxima-vtk interface.

   There are three main functions to be used at Maxima level:
   * 'draw2d', draws a single 2D scene.
   * 'draw3d', draws a single 3D scene.
   * 'draw', can be filled with multiple 'gr2d' and 'gr3d' commands that
     each creates a draw scene all sharing the same window.
   Each scene can contain any number of objects and 'key=value' pairs
with options for the scene or the following objects.

   A selection of useful objects a scene can be made up from are:
   * 'explicit' plots a function.
   * 'implicit' plots all points an equation is true at.
   * 'points' plots points that are connected by lines if the option
     'points_joined' was set to 'true' in a previous line of the current
     scene.
   * 'parametric' allows to specify separate expressions that calculate
     the x, y (and in 3d plots also for the z) variable.

   A short description of all draw commands and options including
example plots (in the html and pdf version of this manual) can be found
in the section Note: Functions and Variables for draw.  A online
version of the html manual can be found at
<maxima.sourceforge.net/docs/manual/maxima_singlepage.html#draw>.  More
elaborated examples of this package can be found at the following
locations:

   <http://tecnostats.net/Maxima/gnuplot>
<http://tecnostats.net/Maxima/vtk>

   Example:

     (%i1) draw2d(
               title="Two simple plots",
               xlabel="x",ylabel="y",grid=true,

               color=red,key="A sinus",
               explicit(sin(x),x,1,10),
               color=blue,line_type=dots,key="A cosinus",
               explicit(cos(x),x,1,10)
     )$
   (Figure draw_intro)

   You need Gnuplot 4.2 or newer to run draw; If you are using wxMaxima
as a front end 'wxdraw', 'wxdraw2d' and 'wxdraw3d' are drop-in
replacements for draw that do the same as 'draw', 'draw2d' and 'draw3d'
but embed the resulting plot in the worksheet.