Provide a row vector as legend

Hi,

I have a bar graph and I'd like to do a legend assigning the values of each column to a specific number which I have stored in a row vector. Since the values of the vector change, instead of writing these myself inside legend(), I'd like to be able to provide the row vector as an input.

Assuming a is my row vector, I tried doing this: legend(a)

But it didn't work.

What can I do?

Thanks in advance for your help.