multiplication on link position matrix

[Chapre]

Hello;
I want to create an operator on a link (position) that should always half the first value of the input matrix (list) and leave the rest intact.

EX: imput matrix=[ a,b ,c ] * operator ------> output matrix=[ a/2 , b ,c ]

[Jeff]

The <link>.preScale command will pre multiply the input matrix with the specified scale:
link.preScale([0.5,1,1],target=viz.LINK_POS_OP)

[Chapre]

Thank Jeff, that's exactly what I needed