Using a variable to help fill in the legend line on a plot

I have a variable that is named in the first lines of my program. It changes each day. I need the variable to fill in a part of legend text.

The variable is below.

Volts="25";

The code for the legend is below.

legend('25V Open circuit 10 to 90% Rise Time');

I need to know how to make it replace only the 25 in the legend with the variable number in enter Volts="XX";

Thank you

Answer 1

[DGM]

You can use sprintf() to construct a bit of text from numeric variables or other string/char variables. Then you can use that in your legend or title as needed.

p = [1 2 3];

x = linspace(0,1,100);
for n = 1:numel(p)
    y = x.^p(n);
    subplot(1,numel(p),n)
    plot(x,y)
    legend(sprintf('y = x^%d',p(n)),'location','northwest')
end