MaplePrimes - answers and comments on Question, Axis in 3DPLOT

try something like this

PatrickT — Sat, 13 Jun 2009 21:27:16 Z

I just posted the following for http://www.mapleprimes.com/forum/coloringplane3dplot, perhaps my answer there might help you too.

The default is typically for the axes to cross at (0,0,0). Alternatives are possible.

Check the Help menu: Graphics -> 3D ->Options ->Overview

Here an example from my stuff:

Define some fonts:

> axesfonts:=axesfont=[TIMES,ROMAN,8]:
> labelfonts:=labelfont=[TIMES,ROMAN,10]:

Define some colors:

> myblue:=COLOR(RGB,.1,0,.55):
> myred:=COLOR(RGB,.9,.1,0):
> mygreen:=COLOR(RGB,.0,.5,.0):

Define the style of plot:

> plotopts:=style=patchcontour, shading=none,axes=boxed:

The plot itself (here an implicit plot):

> xmin:=0, etc.

> p:=plots[implicitplot3d]({f},x=xmin..xmax,y=ymin..ymax,z=zmin..zmax, numpoints=10000, plotopts, colour=myblue):
> display3d({p}, axesfonts, labelfonts, orientation=[-115,15]);

default 3D plot axes

gkokovidis — Sun, 14 Jun 2009 01:32:45 Z

In 3D plots, by default, the axis is not shown, using the plot3d command. I have not tried it with other 3D plot styles. In order to show the origin @ 0,0,0 you can add the "normal" axes option to your plot command. See both versions below for an example.

plot3d(binomial, 0..5, 0..5, grid=[10,10];

plot3d(binomial, 0..5, 0..5, grid=[10,10],axes=normal);

Another way is to use the first version above, right click on the plot, go to Axes, and select normal.

Regards,
Georgios Kokovidis

Dräger Medical

Thanks for all those

hanswurst — Tue, 16 Jun 2009 09:49:48 Z

Thanks for all those responses.

The problem is: I'm trying to plot a List of Polygons using the (old?) PLOT3D command in the fashion "PLOT3D(op(mylist))". You cannot add parameters there like axes=normal etc.

plot followed by display

PatrickT — Tue, 16 Jun 2009 11:04:27 Z

create the plot first, along the lines of

p:= plot3d( etc.

then display it with the parameters, along the lines of:

display(p,axes=normal)

should work

ah, thanks a lot!

hanswurst — Tue, 16 Jun 2009 16:53:58 Z

ah, thanks a lot!

Don't use PLOT3D

DJ Clayworth — Wed, 17 Jun 2009 18:04:28 Z

You can create polygons from lists using the command polygonplot from the plots package. Type 'polygonplot' into the help system.

It is strongly recommended that you don't use any of the 'uppercase' plot commands like PLOT and PLOT3D. They look like commands, but they are actually the internal language used by the plotting system. They are only exposed to the user for the very, very small number of times that you need to go behind the scenes. Using them bypasses a lot of code that does error-checking and optimization, and using them is always harder than the normal commands. There is almost always a regular command that does whatever you need to do that can be done with PLOT or PLOT3D.

David Clayworth Maplesoft GUI Developer