LAG function

[#1]

Hi All, 

I'm hoping this is an easy line of code someone can help me with. 

I have a LAG function script written, but it's not letting me grab the first Run. 

How can I get it to see that there's a Run 1, and not just skip it?

Attached is the data.

Thanks!

Here's my script:

Names Default To Here( 1 );

dt = Current Data Table();
dt << select where( :name( "Run" )[Row()] != Lag( :name( "Run" )[Row()] ) );

dtNew = dt << subset( selected columns( 0 ), selected rows( 1 ) );

[#2 · Accepted solution]

add | row() == 1

dt << select where( :name( "Run" )[Row()] != Lag( :name( "Run" )[Row()] ) | Row() == 1 );

[#3]

THANK YOU!