LaTeX interpreter on a legend

I want the greek letter on my legend to look like as it does in LaTeX. Here is the code:

clc;
clear all;

phi=[1/2,1/3,1/4];
l=-0.1:.05:.1;

p = @(x,phi,l) 1/3.*(exp(x.^(phi))-1)./(exp(x.^(phi))+1) + l;

x=linspace(0,.2,101);

for k2 = 1:length(l)
    figure(k2)
    legendCounter = 1;
    for k1 = 1:length(phi)
        pValues = p(x,phi(k1),l(k2));
        if any(pValues >= 0)
            plot(x, pValues)
            drawnow;
            hold all
            ar{legendCounter} = sprintf('{\\it\\phi_{state} =}%s',rats(phi(k1),3));
            legendCounter = legendCounter + 1;
        end
    end
    grid
    axis([0 .21 0 .25])
    hold off
    legend(ar, 'Location','best')
    plot2svg(['a=',num2str(k2),'.svg'])
end

Even though the greek letter looks fine on the matlab screen, when I see the resulting .svg file, it looks different. Is there any way to adjust this?

Answer 1

[Andrew Newell]

You could try setting the interpreter to LaTeX:

      legend(ar, 'Location','best','Interpreter','latex')

For this to work, you'll have to reformat the equation so there are dollar signs around it:

      ar{legendCounter} = sprintf('$\\phi_\\mathrm{state} =%s$',rats(phi(k1),3));

While I was at it, I made the subscript into Roman characters because that is better style when the subscript is not a variable.

[John]

The problem is in the .svg file. Somehow the .svg shows something different, even after setting the LaTeX interpreter like you did (see attached file).

[Andrew Newell]

If you're using plot2svg from the File Exchange, your best bet is probably to ask its creator.