# What is the time axis array after we convolve two functions in Matlab after sampling it with frequency $f_s$?

Suppose we have a continuous time function $$\f(t)\$$ , we sample it at frequency $$\f_s, (t = -5:1/f_s:5)\$$, and store it in an array $$\a\$$ in Matlab. Now we convolve it with itself using $$\b = conv(a,a)\$$. What is the new time axis array for the convolved function stored discretely in array $$\b\$$ ?