Convert lokal variables in to Global varibles.

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cemsi888 2015-3-9

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https://ww2.mathworks.cn/matlabcentral/answers/182234-convert-lokal-variables-in-to-global-varibles

评论： cemsi888 2015-3-10

i am using gui now in my Project. In order to see some results and use in further pushbuttons i used assignin .However when i want to use These structure Array which i created and made visisble by using assignin,i can not use it unfortunately. do you know any idea haw can i convert local variables in to global variables

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Answer 1

Jan 2015-3-9

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https://ww2.mathworks.cn/matlabcentral/answers/182234-convert-lokal-variables-in-to-global-varibles#answer_170618

By the way: Using assignin and global variables are bad programming practice. Try to avoid it and store the variables in the GUIs ApplicationData, e.g. by the guidata command. Search in this forum for "assignin" to get more opinions to this topic.

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Stephen23 2015-3-9

编辑：Stephen23 2015-3-9

This need to use assignin is apparently common with German MATLAB users: I'm fascinated by the peculiar differences between question in goMatlab and MATLAB Answers: While the majority of German speaking beginners seem to transfer variables to functions by ASSIGNIN and EVALIN (and suffer from the resulting difficulties), this does rarely appear here

Quote from Jan Simon:

http://de.mathworks.com/matlabcentral/answers/1822-foreign-matlab-forums

@cemsi888: Learn to avoid assignin , those variables already have their own workspace, they don't need to be in the base workspace too! Use the debugging tools if you want to have a look at them while you are writing your code.

@Jan Simon: any idea on the origin of this cultural difference?

cemsi888 2015-3-10

@ Adam i created structurearray which Name is Info. It contains Information about pfad file Name etc. My target is after i choose and read the article i want to see which file did i choose where can i this file find etc.. Yes you are right..In german matlabforums they generally advice to use assiginin and evalin...

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Answer 2

Stephen23 2015-3-9

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编辑：Stephen23 2015-3-9

在 MATLAB Online 中打开

Read the documentation for global. It has examples too, like this one:

function setGlobalx(val)
global x
x = val;

and

function r = getGlobalx
global x
r = x;

which you can use to store a value, and retrieve it later using, even from a different workspace.

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Image Analyst 2015-3-9

And read the FAQ too. http://matlab.wikia.com/wiki/FAQ#Are_global_variables_bad.3F If you're careful you can use globals without problem. Of course if you do dumb things in a function like assign a variable that you shouldn't have, then outside of that function the bad value will be seen regardless if you assigned it to a global variable or used setappdata()/getappdata() to assign/retrieve it.

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