MATLAB GUI - How can I get programmatically whether an 'axis' object is empty or not?

Question

Paolo 2013-9-23

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/87957-matlab-gui-how-can-i-get-programmatically-whether-an-axis-object-is-empty-or-not

编辑： Ahmed Ali 2022-8-26

I have a MATLAB GUI, in which there is a figure (an 'axis' object). I would like to know programmatically whether there is or not a plot in that figure/axis, because I would like to add an 'axis limit' control. The code would be:

if figure_is_empty
  axis([xMin xMax yMin yMax])
else
  don't do anything, because there is nothing to 'resize'
end

Any suggestion?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2013-9-23

6
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/87957-matlab-gui-how-can-i-get-programmatically-whether-an-axis-object-is-empty-or-not#answer_97547

在 MATLAB Online 中打开

The objects are called "axes" with "e".

If an axes contains any object, you find it in the list of its children:

isEmpytAxes = isempty(get(AxesHandle, 'Children'))

How the AxesHandle can be obtained depends on the details of your program.

The emptiness of a figure is something else: It means that the figure does not contain axes objects, buttons, menus etc. Notice that children can be hidden also, then allchild is useful:

allchild(gcf)