Why does the LaTeX command \textbf{\textregistered} displays the glyph with "r" in a circle and not the capital letter "R" in a circle in MATLAB 7.9 (R2009b)?

The command:

text(0.1,0.5,'\textbf{\textregistered}','Interpreter', 'latex')

returns the text registered symbol with a non capital "r". I was expecting to obtain the standard symbol with a capital R in a circle.

Answer 1

[MathWorks Support Team]

This is an expected behavior. The \textregistered macro when included in bold text, since it is composed of small-caps letter, degrades to a regular shape letter in bold font.

The glyph then becomes a circled "r" instead of a circled "R". In standard LaTeX the use of additional packages like "textcomp" can solve the issue. MATLAB offers a limited subset of LaTeX instruction and it does not include this package to correctly display the symbol in bold format.

As a workaround consider using the command without the \textbf{} option:

text(0.1,0.5,'{\textregistered}','Interpreter', 'latex')