Formatting Legend Entries Properly

Hello, I'm trying to add a legend entry with greek letter (mu & sigma) something like: "A - \sigma_A = 75 um" ... for ABCD. Below is my attempt. Thanks for your help. Truly, Michael

letter = {'A','B','C','D'}
legstr ={};
for box=1:4
    % Find deviation, print string in Legend
    str{box} = sprintf(... % aiming for: "A - \sigma_A = 75 um", "B - ..."
        [letter{box},' - \Sigma_',letter{box},...
        ' = %.0f \mum'],stdDevData_um(box));
legstr = {legstr, str{box}} 
$e$n$d; clear box

xlim([0.5 19.5]); 
legend(phh, legstr,'location','best');

Answer 1

[Robert Cumming]

When using sprintf you have to cancel the \ operator, to do this use a double \\

 str{box} = sprintf(... % aiming for: "A - \sigma_A = 75 um", "B - ..."
        [letter{box},' - \\Sigma_',letter{box},...
        ' = %.0f \mum'],stdDevData_um(box));

[Michael]

Thank you, I'm not sure how I missed that!