Can I change the Import tool settings

When Matlab 2022 imported data into tables, the column names had non standard characters replaced with null. Matlab 2025 is replacing them with underscores. Can I change a setting somewhere to use null again of underscore?

[Walter Roberson]

How exactly are you importing the data into tables?

[Tim]

I am using just the right click menu command. Hoping there is a way that does not need code everytime I load a csv.

Answer 1

[Chuguang Pan]

You can change data import settings with detectImportOptions function. You can configure VariableNamingRule = "modify" (default) | "preserve". In "modify" option, invalid variable names will be converted to valid MATLAB identifiers, while "preserve" option will preserve original variable names with non standard characters.

[Tim]

Thanks Chuguang. The default "modify" appeqars to be an underscore. Vp (m/s) becomes Vp_m_s_. Looks a bit weird. Hoping someone knows an obscure file or setting somewhere I change that underscore to a null.