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

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Hamid Reza Barzegar 2017-2-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/323435-how-do-i-put-variable-values-into-a-text-string-for-legend

评论： Star Strider 2017-2-5

采纳的回答： Star Strider

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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

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采纳的回答

Star Strider 2017-2-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/323435-how-do-i-put-variable-values-into-a-text-string-for-legend#answer_253409

在 MATLAB Online 中打开

Use the sprintf function:

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

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Hamid Reza Barzegar 2017-2-5

在 MATLAB Online 中打开

I found it.

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

Thanks for your reply.

Star Strider 2017-2-5

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.

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