How to declear global array and how to use it ?

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Isee You 2013-5-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/74626-how-to-declear-global-array-and-how-to-use-it

采纳的回答： Jan

I want to declare global array and i want to use it in different function.

how to add data to this array without deleting the other data that are already on it

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Answer 1

Jan 2013-5-4

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https://ww2.mathworks.cn/matlabcentral/answers/74626-how-to-declear-global-array-and-how-to-use-it#answer_84411

编辑：Jan 2013-5-4

在 MATLAB Online 中打开

It is a good programming style to avoid globals. They have the bad disadvantage, that it is very hard to find out, which part of the program is responsible for the last modification in case of problems. Therefore they impede debugging.

If you think, you have a really good reason to use globals, you have to declare them in each function. Use a very specific name, to avoid conflicts with other programs:

function out = myFunc1(in)
global myToolbox_Global
myToolbox_Global = [myToolbox_Global, now];
out = in;  % A silly example code...
end
function out = myFunc2(in)
global myToolbox_Global
myToolbox_Global = [myToolbox_Global, now];
out = in;  % A silly example code...
end

Well, "myToolbox_Global" is not very specific. An abbreviation of your name and the name of the program would be better. Remember that any globals are an invitation for bugs caused by unintended overwriting of values.