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

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Eduardo
Eduardo 2024-10-7
移动：Rik 2024-10-7
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?

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Stephen23
Stephen23 2024-10-7
移动：Rik 2024-10-7
Ran in:
"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.

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