Calculating inverse of non square matrix

I have four 1*2000 matrix like u1, u2, u3, u4 whose each dimensions is 1*2000, i want to find their inverse independently, when i use pinv() code it will find inverse but is that a correct code to find the inverse of non square matrix?

Answer 1

[Walter Roberson]

u1i = u1.'./ sqrt(sum(u1.^2))

could be said to be the inverse, in that u1 * u1i = 1 if I have worked things correctly and u1 is not all zero.