在 wxdraw2d 或 wxplot2d wxmaxima 中反转 abscissa/ordinate 轴
Reverse abscissa/ordinate axis in wxdraw2d or wxplot2d wxmaxima
默认情况下，draw/plot 函数按升序（从下到上）绘制 y 轴值。换句话说，-ve 值位于图的底部，+ve 值位于原点上方（朝向图的顶部）。我们可以反转（见附图）单个轴或两者的这种行为吗？
在gnuplot中是可以的，通过set xrange reverse和set yrange reverse，但是wxmaxima没有为gnuplot提供完整的接口，但是，似乎可以直接访问。来自文档：
2.3.5 Opening gnuplot’s command console in plot windows
On MS Windows, if in Maxima’s variable gnuplot_command “gnuplot” is replaced by “wgnuplot”, gnuplot offers the possibility to open a console window, where gnuplot commands can be entered into. Unfortunately, enabling this feature causes gnuplot to “steal” the keyboard focus for a short time every time a plot is prepared.
另请注意，gnuplot 4 和 5 存在差异：
The reverse keyword of the set [axis]range command aects only autoscaling. It does not invert or
otherwise alter the meaning of a command such as set xrange [0:1]. If you want to reverse the direction
of the x axis in such a case, say instead set xrange [1:0].
默认情况下，draw/plot 函数按升序（从下到上）绘制 y 轴值。换句话说，-ve 值位于图的底部，+ve 值位于原点上方（朝向图的顶部）。我们可以反转（见附图）单个轴或两者的这种行为吗？
在gnuplot中是可以的，通过set xrange reverse和set yrange reverse，但是wxmaxima没有为gnuplot提供完整的接口，但是，似乎可以直接访问。来自文档：
2.3.5 Opening gnuplot’s command console in plot windows On MS Windows, if in Maxima’s variable gnuplot_command “gnuplot” is replaced by “wgnuplot”, gnuplot offers the possibility to open a console window, where gnuplot commands can be entered into. Unfortunately, enabling this feature causes gnuplot to “steal” the keyboard focus for a short time every time a plot is prepared.
另请注意，gnuplot 4 和 5 存在差异：
The reverse keyword of the set [axis]range command aects only autoscaling. It does not invert or otherwise alter the meaning of a command such as set xrange [0:1]. If you want to reverse the direction of the x axis in such a case, say instead set xrange [1:0].