How to display the code is running?

Question

Benson Gou 2019-1-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440476-how-to-display-the-code-is-running

回答： Image Analyst 2019-1-19

Hi, All,

I have a code which takes several minutes to finish the execuation. I donot want to display the middle results on the screen, but I do want to show (to anyone who runs it) that the code is running on the screen. Could anyone tell me how to do that?

Thanks. Benson

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

Image Analyst 2019-1-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440476-how-to-display-the-code-is-running#answer_357086

在 MATLAB Online 中打开

See these snippets:

	% Change mouse pointer (cursor) to an hourglass.
	% QUIRK: use 'watch' and you'll actually get an spinning blue circle (Windows 10) or an hourglass not a watch.
	set(gcf,'Pointer','watch');
	drawnow;	% Cursor won't change right away unless you do this.
	% Change mouse pointer (cursor) to an arrow.
	set(gcf,'Pointer','arrow');
	drawnow;	% Cursor won't change right away unless you do this.

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。

Answer 2

Walter Roberson 2019-1-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440476-how-to-display-the-code-is-running#answer_357077

If the code takes a known number of iterations, then you can use waitbar() to display a progress bar.

If the code does not take a known number of iterations, then you would not know what value to update waitbar with. It can be formally proven that there are tasks for which you cannot possibly figure out how many iterations you will need ahead of time, where you can only recognize that you achieved a goal without any possible clue as to how much work you will have to go through to get there.