How to label the axes of a figure as Re and Im in the style of \mathfrak{Re} or \mathbb{Im} (from LaTeX \usepackage{})?

Ironically the Insert LaTeX functionality (provided for by the live editor) produces the desired result, e.g.: , but as far as I know this can not be utilized inside figures? Unfortunatley LaTeX packages which are not loaded in MATLAB by default are needed to use \mathfrak{}, \mathbb{} and \mathscr{}. I have done som digging, and from what I could gather it seems that the newer versions of MATLAB deals with LaTeX in a different manner than that of the earlier versions. Thus, the tex.m file cannot be edited to \usepackage{mathrsfs} and \usepackage{amssymb} as described here: https://stackoverflow.com/questions/12250919/how-do-you-use-the-latex-blackboard-font-in-matlab/12251619#12251619, and here https://tex.stackexchange.com/questions/98760/including-package-to-create-matlab-labels-using-latex/98803#98803. Is the \input and mwarticle.cls methods from the LaTeX Stack Exchange also obsolete? If not, how can they be used today? Are there any other methods which can be used to import/include LaTeX packages in MATLAB?

If not, when did this change, and can I download a MATLAB version before this was changed, such that I can follow the guide from StackOverflow, and include the packages I need?

Other possible solutions (?):

1. Are there any fonts that matches what I am looking for? Can I download and use amsfonts directly, and use it in \fontname?

listfonts                      % prints out all available fonts
title('\fontname{Courier} Re') % maybe one of the fonts looks like what \mathbb{Re} or \mathfrak{Re} produces?

2. \Re and \Im with 'tex' yields ℜ and ℑ + some trick I am not familiar with to obtain𝔢 and

(https://se.mathworks.com/help/matlab/creating_plots/greek-letters-and-special-characters-in-graph-text.html#mw_421aadf2-3104-41f5-ae7e-57bf5f7cdde3, link to the supported special characters for the 'tex' interpreter)

xlabel('\Re', 'interpreter', 'tex')   % Output is a nice R
xlabel('\Re e', 'interpreter', 'tex') % Output is a nice R, but the e looks horribly out of place
ylabel('\Im', 'interpreter', 'tex')   % Output is a nice I
ylabel('\Im m', 'interpreter', 'tex') % Output is a nice I, the m does not look good

Are there any methods to get the second characters looking like the first?

3. Unicode?

https://se.mathworks.com/matlabcentral/answers/24790-latex-interpreter-and-blackboard-bold-mathbb-for-text

https://en.wikipedia.org/wiki/Blackboard_bold

Not sure as to how this would be implemented, and which unicodes to use for a nice looking Re and Im, which fits into a LaTeX generated pdf.

4. matlab2tikz?

https://se.mathworks.com/matlabcentral/fileexchange/22022-matlab2tikz-matlab2tikz

[Walter Roberson]

Maybe one of

xlabel('$(A)\,\Re\textrm{e} (B)\,\Re\textsf{e} (C)\,\Re\texttt{e} (D)\,\Re\textbf{e} (E)\,\Re\textmd{e}$', 'interpreter', 'latex')

Warning: Error updating Text.

Font cmss10 is not supported.

The font warning is from the textsf version.

[Walter Roberson]

Unicode cannot be used with the LaTeX that Mathworks provides. Unicode can be used with interpreter 'tex' or 'none'

It looks like https://github.com/Happypig375/AMSFonts-Ttf-Otf contains amsfonts converted to TrueType (MATLAB needs TrueType)

Answer 1

[Jørgen Myklebust]

I found a solution which gives me exactly what I want. Simply;

1. Download the wanted font (as a .ttf file!)
2. Install the font for all users (Windows PC: done by right clicking the .ttf file and installing on all users, I needed admin to do this)
3. Make sure that the font shows up in the list when running listfonts in the Command Window. Take note of its name, since it is used to set the font in the figure. If ou have done the steps above and the font still does not show up, try to find a different font file and use that
4. Make your figure

I downloaded this Fraktur BT font to get and like i wanted on my xlabel and ylabel.

Example of figure code (step 4), important commands at the bottom:

% Boilerplate________________________________________________
figure(1)
hold on
grid on
plot(rand(1,10), rand(1,10),'r-.*', 'LineWidth', 1.5);
title('\bf{Re og Im}', 'Interpreter', 'TeX')
xlabel('\bf{Re}', 'Interpreter', 'TeX')
ylabel('\bf{Im}', 'Interpreter', 'TeX')
legend('\bf{Complex Numbers}','Interpreter','TeX')
set(gca, 'TickLabelInterpreter', 'LaTeX');
hold off
%____________________________________________________________

% Here are the Important Commands! 'Fraktur BT' has to be changed with the
% font you want to use
set(get(gca, 'Title'),  'FontName', 'Fraktur BT', 'FontAngle', 'normal', 'FontWeight', 'normal', 'FontSize', 14);
set(get(gca, 'xlabel'), 'FontName', 'Fraktur BT', 'FontAngle', 'normal', 'FontWeight', 'normal', 'FontSize', 13);
set(get(gca, 'ylabel'), 'FontName', 'Fraktur BT', 'FontAngle', 'normal', 'FontWeight', 'normal', 'FontSize', 13);
set(get(gca, 'legend'), 'FontName', 'Fraktur BT', 'FontAngle', 'normal', 'FontWeight', 'normal', 'FontSize', 13);

Answer 2

[Santosh Fatale]

Hi Jorgen,

Following are answers to your questions:

• You can download the previous version of MATLAB from the following the steps mentioned in the answerHow do I download an older release of MATLAB? - MATLAB Answers - MATLAB Central (mathworks.com)
• Adding Latex packages is not currently possible with MATLAB version. This change has been made from R2013b.
• For the Latex symbol you are searching, you can try below code syntax.

plot(1:5, randi(10,1,5));
xlabel("\Ree \Imm", "Interpreter", "tex"); 
% No space between \Re and letter 'e' and same for \Im and letter 'm'