Does syntax checking support undefined variables?

Does matlab support undefined variables like pycharm(fig 1)?The system and software are as follows:window10,matlab r2022b.

Answer 1

[Hiro Yoshino]

MATALB automatically identifies problems. Debugging features help you diagnose specific issues, see as follows :

Debugging and Analysis

I suppose this function is active by default though.

[bing zhu]

[bing zhu]

thank you for response, my matlab software syntax check function does not support undefined variables(fig1), the debugging efficiency is slow because errors are reported only after the script is run.the function to identify undefined variables was not found in code analyzer, How does matlab software syntax check support undefined variables？

[Hiro Yoshino]

Sorry, I took it wrong. Let me put it this way....: No, but the problem identifier is "on" by default.

The trouble is that MATLAB never knows if the variable "b" exists in your workspace. So this syntax can be wrong and can be right dependiong on the situation.

For example, you may run a simulation using Simulink models and export something as a variable that would not exist without a run of the simulation. An automatic analysis will be perfomed, once the simulation is over. Your variable "b" is used in the script of this automatic analysis

So this is not a "bug" but a feature.

You can check if your variables exist in the workspace by the method like this.

[bing zhu]

Thanks for your response