I'm trying to add a text box to a figure. I'm using:
figure
semilogy([3 10],[1E-10 1E5],'o'); hold on
mylabel('10,000/T (1/K)','R_{c} (kmol/m^2)','Carbon Reaction Rates')
text(4,1E3,'R_c = 2R_{s2}+R_{s3}=2k_2[Y_{O2}]+k_3[Y_{CO2}]','interpreter','tex')
and I get the following result with no subscripts: