kk22boy
恩，就是想画隐函数。ezplot就是画隐函数的一个命令。comet是一个动态模拟的命令。
FMOLS是完全修正最小二乘方法
DOLS是动态最小二乘方法。
在网上看到这么一段：
This is a Maxima-Gnuplot interface.
There are three functions to be used at Maxima level: draw2d, draw3d and draw. To read the available documentation about functions, variables and graphic options, type as usual something as ? point_type.
More or less, this package works as follows. Scenes are described in gr2d or gr3d objects, which are then passed to function draw. If more than one scene is described, a multiplot will be generated, as in
draw(gr2d(...),gr3d(...))
but if you want only one scene, draw2d(...) and draw3d(...) are equivalent to draw(gr2d(...)) and draw(gr3d(...)), respectively. See examples bellow.
Type ? gr2d and ? gr3d to know available graphic objects in two and three dimensions.
You need at least Gnuplot 4.2 (better 4.2.2) and Maxima 5.14 to run this package. Type load(draw); to make use of it.
draw2d(terminal = eps,
grid = true,
line_type = solid,
key = "y^2=x^3-2*x+1",
implicit(y^2=x^3-2*x+1, x, -4,4, y, -4,4),
line_type = dots,
key = "x^3+y^3 = 3*x*y^2-x-1",
implicit(x^3+y^3 = 3*x*y^2-x-1, x, -4,4, y, -4,4),
title = "Two implicit functions" );
好像这个命令可以作隐函数图
可是还是不知道该怎么去用，因为load（draw）的时候，总不成功
