I want to index a element of a vector after defining it

I want to select the first element of a vector without having to store it in a variable. For example, if i want to know the smallest prime divider of a number, i want to write this

factor(56)(1)

However this is invalid. Any correct way to do this?

Answer 1

[Stephen23]

"Any correct way to do this?"

Yes, but only if you want to make your code complex, awkward, and obfuscated:

subsref(factor(56),substruct('()',{1}))

ans = 2

struct('x',factor(56)).x(1)

ans = 2

The MATLAB approach: store it in a vector. Note that how many lines you use is not an indicator of runtime efficiency.

[Eduardo]

Thanks, i guess i will store it in a vector