1

=T("D://titanic_export.csv")

2

=A1.(Survived_1_percentage).ranks()

3

=A1.derive(A2(#):rank)

4

=A3.groups(Survived;sum(rank):sum_rank,count(~):count)

5

=(A4(2).sum_rank-A4(2).count*(1+A4(2).count)/2)/(A4(2).count*A4(1).count)

/auc

6

=2*A5-1

/gini

7

=A1.sort@z(Survived_1_percentage)

8

=A7.len()\10+1

9

=A7.derive(#\A8:decile)

10

=A9.groups(decile;count(Survived==1):event,count(Survived==0):non_event)

11

=A10.derive(event+cum_event[-1]:cum_event,non_event+cum_non_event[-1]:cum_non_event)

12

=A11.derive(cum_event/A4(2).count-cum_non_event/A4(1).count:ks)

13

=A12.max(ks)

/ks