getting warning message about Latex

I am a MATLAB R2023a user

At line 232 of my code which is,

xlabel('$k(2\pi/a_{0})$','Interpreter','latex');

I am getting the warning message below. What should I do to debug my code?

(line 232)

Warning: Symbol font is no longer supported. To display special characters, use TeX or LaTeX markup with the

Text Interpreter property set to TeX or LaTeX.

[Dyuman Joshi]

This works here on R2023b and on my R2021a (Update 8, Win 10) without any warning message -

fplot(@sin)
xlabel('$k(2\pi/a_{0})$','Interpreter','latex');

Disregarding the warning, do you get the correct output for the x-label?

[Cris LaPierre]

Is there somewhere else in your code that you set the fontname? See this blog for how someone else fixed the error: https://blogs.mathworks.com/pick/2016/10/14/blackjack/

[Walter Roberson]

Is there somewhere else in your code that you set the fontname?

In particular,

get(0,'DefaultAxesFontname')

ans = 'Helvetica'

Answer 1

[arushi]

Hi Bora,

I understand that you are getting the warning message at line 232 which is

xlabel('$k(2\pi/a_{0})$','Interpreter','latex'); 

However,this works fine on my R2023a version without any warning errors.

The warning message you received indicates that MATLAB no longer supports the Symbol font, which was previously used to display special characters. Instead, MATLAB now recommends using TeX or LaTeX markup for special characters, along with setting the Text Interpreter property to 'TeX' or 'LaTeX'.

In your code, you are already using LaTeX markup and setting the Interpreter property to 'latex', which is the correct approach. However, you are still getting a warning, which suggests that there might be an issue elsewhere in your code where special characters are being used without the appropriate Interpreter setting.

To ensure that LaTeX is used consistently for all text elements that require it, you should check your entire code for any other instances where text is being set (e.g., title, ylabel, text, legend, etc.) and make sure that the Interpreter property is set to 'latex' for those as well.

Hope this helps.

Thank you