八度音轴的投影特性

Question

I'm trying to run matlab code in octave which works quite well, but when it comes to the point:

axes('Projection','perspective')

the code breaks with following error

error: invalid value = perspective
error: set: invalid value for radio property "projection" (value = perspective)
error: called from:
error:   /usr/share/octave/3.6.4/m/plot/axes.m at line 39, column 9

I know from the docs that matlab supports this property, but octave seems not to support this feature. Do you know if I've to install an additional package to get this feature or does octave not support this feature at all?

The octave doc is not very helpful in this point. Additionally I didn't found any information on this.

Here is my list of installed packages (os = xubuntu 13.10 64 bit):

• i liboctave-dev - Development files for the GNU Octave langu
• i A liboctave1 - Shared libraries of the GNU Octave languag
• i octave - GNU Octave language for numerical computat
• i A octave-common - architecture-independent files for octave
• i A octave-control - control functions for Octave from Octave-F
• i octave-doc - PDF documentation on the GNU Octave langua
• i A octave-general - provide extra general functions for Octave
• i octave-htmldoc - HTML documentation on the GNU Octave langu
• i octave-image - image manipulation for Octave
• i A octave-info - GNU Info documentation on the GNU Octave l
• i A octave-io - input/output data functions for Octave
• i A octave-java - Java objects manipulation interface for Oc
• i octave-linear-algebra - additional linear-algebra functions for Oc
• i octave-plot - additional plotting tools for Octave
• i octave-plplot - Octave support for PLplot, a plotting libr
• i octave-signal - signal processing functions for Octave
• i A octave-specfun - special mathematical functions for Octave
• i octave-statistics - additional statistical functions for Octav
• i qtoctave - Qt front-end to Octave

Answer 1

I cannot reproduce your error on my octave version 3.8.2

the command

axes('Projection','perspective')

does not throw an error, however, as in other instances octave normally complains about single use quotations so you can try

axes("Projection","perspective")

According to the Octave documentation :

projection: {"orthographic"} | "perspective" selected: {"off"} | "on" selectionhighlight: "off" | {"on"} tag: string, def. ""

A user-defined string to label the graphics object.