MATLAB: How to obtain bold formatted mathematical expressions in MATLAB using LaTeX

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I want to place mathematical expressions in bold format on my plot. I have tried to use the {\bf} and {\textbf} declarations, but I receive an error and the expression does not get displayed. I am using the following commands to obtain the bold mathematical expressions:

text('position',[0.5 0.5],'Interpreter','latex','String','$\bf{\alpha}$')

This gives me the following error:

 Warning: Unable to interpret TeX string.  Undefined control sequence.

The following command uses {\textbf} instead of {\bf}

text('position',[0.5 0.5],'Interpreter','latex','String','$\textbf{\alpha}$')

but this results in the following error:

 Warning: Unable to interpret TeX string.  Missing $ inserted.

Best Answer

The problem with the above two statements is that they are trying to mix Text mode and Math mode in LaTeX. One way to obtain bold fonts in Math mode is to use the {\boldmath} declaration. The following statement demonstrates the use of{ \boldmath}:

 text('position',[0.5 0.5],'Interpreter','latex','String','{\boldmath$\alpha$}')

It is important to note that these commands should not be used in math mode. Thus, a complicated mathematical expression, where only certain symbols are desired in bold font, may be obtained by entering and exiting Math mode as required. Following is an example:

 text('position',[0.5 0.5], 'Interpreter','latex','String','$\|${\boldmath${\alpha}$}$\|$');

Related Solutions

MATLAB: How to make Greek characters and regular text have same font weight in Tex markup

Greek letters are displayed in a different font style, so we expect them to appear slightly different. However, here are several possible approaches to make the Greek characters and regular text appear more similar:

1) Use the LaTeX interpreter so that all items are displayed using the LaTeX font style:

https://www.mathworks.com/help/matlab/creating_plots/greek-letters-and-special-characters-in-graph-text.html#mw_f46705d3-cc38-4f7e-b947-992866f293cc

This requires wrapping what must be interpreted as a formula into $$:

text( 0.5, 0.5, {'$\alpha$','name'}, 'Interpreter', 'latex' ) ;

2) Split up your call to "text", first displaying the Greek character as bold, then displaying the regular text as not bold. For example,

text( 0.5, 0.5, '\bf\alpha');

text( 0.5, 0.5, ' name');

The two pieces of text should now be more similar in font weight.

3) Another option to consider is changing the font style of the regular text such that it is more similar in weight to the Greek characters. You can do this by using the "\fontname{}" modifier

https://www.mathworks.com/help/matlab/creating_plots/greek-letters-and-special-characters-in-graph-text.html#bux4rpf

MATLAB: TickLabelInterpreter axis ticks bold

With the LaTeX interpreter you need to define the label as '{\boldmath$\alpha$}' to get a bold face font.

See https://www.mathworks.com/matlabcentral/answers/100493-how-do-i-obtain-bold-formatted-mathematical-expressions-in-matlab-using-latex

[EDITED]:

axesH = gca;
axesH.XAxis.TickLabelInterpreter = 'latex'
axesH.XAxis.TickLabelFormat      = '\\textbf{%g}';

Two \ are required, because at first sprintf is applied and then the LaTeX interpreter.

Best Answer

Related Solutions

MATLAB: How to make Greek characters and regular text have same font weight in Tex markup

MATLAB: TickLabelInterpreter axis ticks bold

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