How do I know when to use loops and when to use vectorization?

In this question, the solution is achieved by using a loop. I thought this could have been achieved only through vectors.

What is the rule of thumb regarding when to use loops and when to use vectors only?

[KSSV]

There is no rule of thumb.....vector is suggested always...in MATLAB.

Answer 1

[Andrei Bobrov]

sprintfc('%d,%d(%d)',mat)

[Ba Ba Black Sheep!]

LOL. Thanks.