Have latex (bold) and variable in legend of a figure

Hello,

I have two lines in one figure, one is called error, and the other is typed by latex form as well as the first element of array ```x```, but I tried to use sprintf, but the results are wierd

```

x=[1.1, 2.1, 3.1]
legend( 'Error',sprintf('\bf[$\bf\frac{t v_p}{r_{well}}$] (\bf$\Pi_1$) = %f', x(1)),  'Location','best','Interpreter','latex' )

```

[KSSV]

What you want to display in legend?

[Miraboreasu]

Hello, you mean what is this latex for?

this, thank you

Answer 1

[KSSV]

plot(rand(1,10)) ;
hold on
plot(rand(1,10)) ;

legend( 'Error','$[\frac{tv_p}{r_{well}}](\Pi_1=)$','Interpreter','latex',  'Location','best')

set(gca,'FontSize',24)

[Miraboreasu]

Thank you, how to make them bold?

[KSSV]

plot(rand(1,10)) ;
hold on
plot(rand(1,10)) ;

legend( '\bf Error','$\bf [\frac{tv_p}{r_{well}}](\Pi_1=)$','Interpreter','latex',  'Location','best')

set(gca,'FontSize',24)

[Miraboreasu]

Thank you, but how to use the element from my array ```x```

Answer 2

[Sam Chak]

Hi @Miraboreasu

I think this should work:

legend({'$\left[\frac{t v_{p}}{r_{well}}\right] \left(\Pi_{1}\right)$'}, 'Interpreter', 'latex', 'location', 'best')

[Miraboreasu]

How to make the font bold