Write sigma in uicontrol / text

Right now, I'm trying to make a GUI, which calculates a certain sum, and I'd like to write a sigma sign, but for some reason, it's not working.

This is what I tried: uicontrol ('Style','text',... 'String','\sigma_1',... 'FontSize',25,... 'Position', [200 340 100 50]);

If I try copy-pasting a sigma sign off google, it just turns into a '?'.

Answer 1

[Sean de Wolski]

Use an annotation instead of a uicontrol. This offers a text interpreter property:

annotation(gcf,'textbox','String','\sigma_1', 'FontSize',25,'units','pix', 'Position', [200 340 100 50],'Interpreter','Tex');

documentation

[Zsolt Lord]

Ok, it's working but now the question is, how do I write a capital sigma? (using \sigma it writes σ, but I want a Σ).

Edit: never mind, figured it out.

[patrick mumba]

please share how you did it

[Image Analyst]

Capitalize sigma:

annotation(gcf,'textbox','String','\Sigma_1', 'FontSize',25,'units','pix', 'Position', [200 340 100 50],'Interpreter','Tex');

Answer 2

[Image Analyst]

See the FAQ entry: http://matlab.wikia.com/wiki/FAQ#How_can_I_get_Greek_letters_and_other_symbols_on_my_GUI.3F

[Image Analyst]

Updated links:

https://matlab.fandom.com/wiki/FAQ#How_can_I_get_Greek_letters_and_other_symbols_on_my_GUI.3F

http://www.mathworks.co.uk/matlabcentral/answers/14751-greek-alphabet-and-latex-commands-not-a-question

Answer 3

[laurent jalabert]

list of greek characters : https://sites.psu.edu/symbolcodes/languages/ancient/greek/greekchart/

For displaying \Theta in a gui

for Style text :

GE = char(hex2dec('03B8')); test = uicontrol('Style','text','String', GE)

For Style list :

GE = char(hex2dec('03B8')); test = uicontrol('Style','list','String', GE)

This is working.

Now, I am using PLOT with ylabel. Those ylabel contains greek characters, displayed correctly since Interpreter Tex is OK.

how can I display an array if ylabell{:} as a Style list in the uicontrol ?

I give an example :

ylabell{1}=('\Theta'); ylabell{2}='\Ree T_i*\gamma [C]' ; 
test = uicontrol('Style','list','Position',[100 100 200 100],'FontSize',14,'max',10,...
   'min',1,'String', ylabell)

The problem is that Interpreter Tex is not a uicontrol class property. So it is impossible to have the same rendering of the greek character in uicontrol such as in ylabl axis of the graph.

So how to solve this problem when the Style list contains 80 different items containing greek characters ?

If I have to convert each greek character using char(hex2dec(' 03B8')), it is a bit fastidious isn't it ?

Strangely, a possible answer is to copy paste Δ instead of \Delta ... and it works both for ylabel and uicontrol list ...