How can I write the value of the array as an exponent in sprintf

Hello, I want write the following function in the legend of my graph: f(x) = a * x^n.

I calculated a and n. Now I want to replace a and n with the corresponding value and write it as a string. So I want to use the command sprintf:

sprintf('\\rm{f(x) = %0.4g * x^%0.3g}', a, n)

The only problem is that I can't get the value for n as an exponent. How can you do that? Is it possible with sprintf?

Thank you for any help!

Answer 1

[Matt Fig]

Works here:

plot(1:10)
legend(sprintf('f(x) = %0.4g * x^%0.3g', .3, 3))

EDIT In response to comments.

In that case:

legend(sprintf('f(x) = %0.4g * x^{%0.3g}', -.3, -3))

[Jan-Erik]

Thank you for you quick answer. I should have made my question more specific. In my case I have a negative decimal number: n = -0.481. The command then only puts the negative sign as the exponent, but not the whole number. I tried using brackets, without success.

[Matt Fig]

See my edit.

[Jan-Erik]

Works perfectly. Thank you so much!