Matlab plot text with subscript character

Dear all, I have been trying to display x label text with subscript. The subscript text contains two numeric or alphanumeric characters. Using '_', it does only first character as in attached figure. However I want all characters after '_' to be subscript. I did not find any clues and or right answers to previous answers. I also tried either of following code. None of them worked.

timescale = 14;
xlabel(['dy_{' int2str(timeScale) '}'], 'Fontsize',16);

or

xlabel(['dy_{' int2str(timeScale) '}'], 'Fontsize',16);

It will be great help to make my figures beautiful. In face same issues happens with supercript and putting 'hat' over the text. I have also attached the figure for your reference.

Thanks in advance

[Star Strider]

Both of your code examples worked for me and produced your desired output (in R2015b) so I’m not listing this as an Answer.

If you want to put hats on characters, you need to use the 'Interpreter','latex' option. See the LaTeX site for the necessary documentation on how to write commands to do it. LaTeX is similar to mot more versatile than TeX, with the additional requirement that you have to start and end each LaTeX call with $.

Answer 1

[Paul Quinn]

Yes, Steven Lord's answer works for me in 2018a.

Answer 2

[Tiffany Calcutt]

'dy_1_4'

Answer 3

[Paul Quinn]

I have the same problem in 2018a.

Tiffany's answer is the (un-elegant) fix: dy_1_4.

[Steven Lord]

I'm using release R2018b, but these should each work in release R2018a as well. With the number hard-coded into the text to be used as the label:

>> xlabel('dy_{14}', 'Interpreter', 'tex')

Below is a version with the number included in the label text. Note that I'm using double quotes and the + operator. This will convert the number into a string and combine it with the other two string arrays dy_{ and }.

>> n = 14;
>> xlabel("dy_{" + n + "}", 'Interpreter', 'tex')

[Sofia]

How would you do it for the case where the variable should be interpreted in LaTeX too? For instance, $\Lambda_n$?

[Kelly Merckaert]

I have the same question as Sofia.

I can get with the code below with a varying number for the subscript.

i=1; 
ylabel("dotq_{" + i + "} [rad/s]", 'Interpreter', 'tex');

I can with the code below with a varying number for the subscript.

i=1;
ylabelname = strcat('$\dot{q}$', num2str(i) , '[rad/s]');
ylabel(ylabelname,'fontsize',12,'interpreter','latex'); 

What I want is a combination of the two, i.e. , with a varying number for the subscript. How can I get this?

[Walter Roberson]

i = 14;
ylabelname = sprintf('$\\dot{q_{%d}}\\,[rad/s]$', i);
ylabel(ylabelname, 'fontsize', 12, 'interpreter', 'latex')

[Kelly Merckaert]

That works! Thanks a lot!

Answer 4

[Matthias Bohnen]

The same Problem occurs in 2020a.

the code

legend([p1 p2 p3], '$u_{r,rel}$(0d)','$u_{r,rel}$(10d)','$u_{r,rel}$(20d)','Interpreter','Latex');

does succesfully interpretate every letter in parantheses as subscript, but not as Latex, so the $-Signs are shown in the legend and the string is not italic.

You can fix it by writing the code as:

L=legend([p1 p2 p3], '$u_{r,rel}$(0d)','$u_{r,rel}$(10d)','$u_{r,rel}$(20d)');
set(L,'Interpreter','Latex');

And it works!