How do I stop MATLAB from giving me this warning? ( Global variables are inefficient and make errors difficult to diagnose. Use a function with input variables instead.)

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Alvin Ang
Alvin Ang 2021-12-22
回答： Image Analyst 2021-12-22
This is the code i used, how do i remove the warning underline below global?
clc;clearvars;close all;
global x
x=5;
A = hello
function A=hello()
global x
A= 5*x;
end

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采纳的回答

Star Strider
Star Strider 2021-12-22
Ran in:
The obvious solution is DO NOT USE GLOBAL VARIABLES!
Here, thie solution is —
x=5;
A = hello(x)
A = 25
function A=hello(x)
A= 5*x;
end
Define the function to have an argument and then pass the argument to it.
See the documentations ection on Function Basics for details.
.

更多回答（1 个）

Image Analyst
Image Analyst 2021-12-22
I haven't tried that one but I'm attaching my function for turning off other warnings.
There are instructions in there for how to figure out how to turn off a particular warning such as the global one you're referring to. Follow those instructions and adapt the function then call it in your opening routine.

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