Hi, I want my output to be column vectors, how do I use the printf statement?

hi,i want my output be a complex number,how do i use the printf command?for example  s=3+4*i be a output.

I'm using the printf command and i want my output a decimal number to get it published

s1=0.5555552487 and f(s1)=0.2542365647 what should i do?

If we have a matrix with n rows and 1 column of n-variable function  how to use the subs?