Hi,

I am trying to understand the command sortrows using the option “by”.

If I have a 3x2 array v:

v = [1 2; 2 4; 3 1]

If I want to sort it by the second column, then I have to do:

`u=sortrows(v, by=x -> x[2])`

I understand that the construction x -> x is an anonymous function.

However, why the construction `x -> x[2]`

means that it should sort array v by the 2nd column ? Can someone provide a little bit more of detail about it ?

thank you