CODEWITHSUNDEEP
matlabannotations
user137684
user137684

Reputation: 133

Add math symbols in an annotation

How can I added a note on a figure plot in Matlab which contain math symbols (kappa, gamma, alpha, symbol of containing, ...) as explained in the image:

enter image description here

Upvotes: 0

Views: 310

Answers (2)

Wolfie
Wolfie

Reputation: 30045

You can add a text label using the text command.

For example

plot(0:10, (0:10).^2);
% Add text at x=5, y=10
text(5, 10, 'this is text');
% Add text at x=5, y=50, with Greek letters
text(5, 50, '\pi is nice, \alpha is too');

This works because the interpreter is set to LaTeX by default. For the full list of supported TeX commands, see this list in the documentation. In particular, since you asked about Greek letters, here is a basic list. Most are as you would expect, preceded by a backslash:

Character Sequence  Symbol
\alpha              α
\beta               β
\gamma              γ
\delta              δ
\epsilon            ɛ
\zeta               ζ
\eta                η
\theta              Θ
\kappa              κ
\lambda             λ
\mu                 µ
\xi                 ξ
\pi                 π
\rho                ρ
\sigma              σ

Notes on the LaTeX interpreter.

You can also render maths inside text captions (or axes labels, and chart titles) using $inline mode$ or $$display mode$$. See the linked docs for more details.

You can set the default interpreter to LaTeX (if for some reason it isn't) using

set(0,'defaulttextinterpreter','latex')

Upvotes: 1

MosGeo
MosGeo

Reputation: 1908

The default interpreter is already latex so all you have to do is something like this as an example. not the backslash to access the latex commands. You will have to search what symbols you want on the internet.


    legend('\rho = 0.5')

Upvotes: 0

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