How do I put variable values into a text string for Legend

I want to put the variable as a legend but in form of power of some amount this is the variable

x=-1.1;

then in the result i want to see 10^-1.1

figure
plot(Ratio,Final_1,'k-x','linewidth',2)
grid on
legendInfo = ['SNR target for BER 10^' num2str(x)]; 
legend(legendInfo,'Location','southeast')
xlabel('Ratio')
ylabel('SNR')

problem i have is this part "'SNR target for BER 10^' num2str(x)" because it is not showing like 10^x

Answer 1

[Star Strider]

Use the sprintf function:

legendInfo = sprintf('SNR target for BER 10^%f', x);

[Hamid Reza Barzegar]

result is like this

but i need like this one

[Star Strider]

This works:

legendInfo = sprintf('SNR target for BER 10^{%2d}', floor(x));

I tested it.

The floor function rounds to -Inf, and allowing a two-digit field with ‘%2d’ makes room for the sign.

[Hamid Reza Barzegar]

Thanks, It's correct. but do you know how to write for float number. Imagine x=-1.2

I need to present it like this

because when i floor(x) it shows another value

[Hamid Reza Barzegar]

I found it.

legendInfo = sprintf('SNR target for BER 10^{%0.1f}', (x));

Thanks for your reply.

[Star Strider]

My pleasure.

I thought you wanted integers rounded to the next lowest integer. The '%.1f' is the correct option for one decimal-place floating-point precision.