How to make 'blue' variable?

11 次查看（过去 30 天）
Mikhail
Mikhail 2014-9-12
评论： Mikhail 2014-9-15
Hi all, I'm trying to make my own ImageViewer. Using some program as a template, I saw a lot of 'blue' variables in it (when I point on such variable there is a text "The scope of variable ... spans multiple function").
Now I understood, that I want to use such variables also - in callback functions to update text, data, and so on.
How can I create such variables? Short explanation of what does it mean is appreciated as well. Thanks.

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2014-9-12
Keywords are in pure blue. Global variables are in cyan. You can just put the line
global myVariable;
in any function that needs to see the global variable. Other than that, just create it and use it like any other variable.
  2 个评论
Mikhail
Mikhail 2014-9-15
But in that template there is only one variable defined as global. However there arre a lot of global variables. When I am trying to do that in my program, my callback function doesn't use it as global
Image Analyst
Image Analyst 2014-9-15
Post a screenshot of your screen so we can see it. In nwindows type alt-PrintScreen, then go to http://snag.gy and paste it in and give us the url or click on the green and brown image icon to paste it in your response here.

请先登录，再进行评论。

更多回答（1 个）

Mikhail
Mikhail 2014-9-15
Look! only 1 global variable is defined, however you can see a lot of cyan variables.
  1 个评论
Mikhail
Mikhail 2014-9-15
Got it, in that template he just wrote callback function inside main function. Therefore variables which he used in both main and callback function automatically became cyan. Thanks

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MuPAD 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