latex - use package

I want to set label text as

c_f2_3D.Label.String = '\frac{a}{b} \text{[cm]}'

I instruct to use the Latex interpreter

c_f2_3D.Label.Interpreter = 'latex';

\text requires to use the amsmath package. How can I fix the label?

[Rik]

I believe there is a folder with LaTeX packages buried deep in the installation folder of Matlab. It might be the only way to add packages. I really hope someone know a better way, but Matlab was not really designed for LaTeX package management.

Answer 1

[Walter Roberson]

c_f2_3D.Label.String = h.String = '$\frac{a}{b}$ [cm]'

the \frac is not valid outside of math mode, but sometimes it is good enough to just exit math mode. Spacing and weight can be a little different outside math mode, I understand. Perhaps

'$\frac{a}{b} \mbox{[cm]}$'

though I cannot say that I see any difference between that and omitting the \mbox . The material I am finding says that \text is the same as \mbox except that \text will use a smaller font if it is within a subscript.