uicontrol callback 'disp

2011 4 12
1 个回答
回答已采纳
2 次查看（30 天）

0 个投票

Hello, when I input the following line of code into the Matlab command window: h = uicontrol('style', 'pushbutton', 'string', 'Hello', 'position', [20 150 100 70],'callback', 'disp("Hello World")');
it seems to work because a user interface comes up with no initial error with a button that has the words Hello World on it. But then when I press the button I get the following error:
??? Error using ==> disp("Hello World") Error: The input character is not valid in MATLAB statements or expressions.
??? Error while evaluating uicontrol Callback
What could I be doing wrong? I got the simple callback example from a Matla basic GUI Programming manual.
Thanks for any suggestions.

请先登录，再回答此问题。

 采纳的回答

Paulo Silva
Paulo Silva 2011-4-12

0 个投票

h = uicontrol('style', 'pushbutton', 'string', 'Hello', 'position',...
[20 150 100 70],'callback', 'disp(''Hello World'')');

2 个评论
显示 无 隐藏 无

Oleg Komarov
Oleg Komarov 2011-4-12
@melissa: the difference is in the single apostrophe repeated twice.
melissa
melissa 2011-4-12
Thank you Paulo and Oleg so much. I would have never caught that! I knew it had to be something simple but I've never heard of a single appostrophe being used twice to display text instead of quotation marks, so I didn't even think about that.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Interactive Control and Callbacks 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by