How do I use same variables in different scripts?

Hello,

Sorry for the weird English. I did my best to explain what I am struggling with....

I am wondering if you assign variable in one script, then can use those variables in another script?

For example,

In script A,

A=12;

B=23;

C=25;

D=...;

C=....;

there are tons of variables in script A.

In function script,

I want to use all variables in script A instead of assigning everything again.

thanks,

Answer 1

[Adam Danz]

Review Scripts vs Function and Base and Function Workspaces from the documentation.

If you run script A and then script B in the same workspace, then all variables in A will remain available unless a variable is explicitly cleared or, more commonly, overwritten. This is poor workflow, though. It becomes quite difficult to troubleshoot the origin of variables and how they were changed.

A better idea is to use function input/outputs. If you're working with a lot of variables, you can store them in a structure or cell array to reduce the number of inputs/outputs and to keep your data organized.

Don't use global variable, eval, evalin, etc, to pass variables.

For other opinions on this, see these threads in the forum

• https://www.mathworks.com/matlabcentral/answers/16544
• https://www.mathworks.com/matlabcentral/answers/407576

[Duckyoon Go]

Thank you sir, I guess my approach is not appropriate. Links helped alot.

[Adam Danz]

Agreed. I know it may seem like a lot of work to change tons of variables but now you know how to plan for this in the future and your updated functions will work so much more smoothly.