How to set global options?

Question

Somebody 2013-1-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59343-how-to-set-global-options

Hello.

Im trying to set global options so I can no longer set them in my code, like this:

global options
options = optimset('Display','off');

But when i call:

function 
...body...
y = fsolve(......, options)
end

matlab asks me to provide options fisrt. Like he doesnt see it. What do I do wrong? Thank you.

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Answer 1

Shashank Prasanna 2013-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/59343-how-to-set-global-options#answer_71789

在 MATLAB Online 中打开

For a global variable to enter the scope of any given workspace you will have to call global var_name again. This will tell MATLAB to make that global variable accessible in that workspace. In you specific case try something like this:

global options
options = optimset('Display','off');
function 
...body...
global options
y = fsolve(......, options)
end

But I will still recommend that you pass options as an argument to that function and not use the global approach.

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Somebody 2013-1-20

编辑：Somebody 2013-1-20

Thank you, it worked. I thought it could speed up my calculations, but it didnt. 1 more question. To speed up (i need to use fsolve like thousants times in a row) i need to set as few options as possible. But printing results (with display 'on' as default) makes it impossible. Is there any other ways to shut the display down? It could be something like 'disp off' maybe.

Shashank Prasanna 2013-1-20

在 MATLAB Online 中打开

optimset('Display','off')

is the right way to turn off display. Why are you unable to use this in your program? setting the same options won't necessarily show down your program. You may verify this by using the MATLAB profiler.

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