apl>" <-APL2-------------------- sam269.txt ---------------------------->


apl>" <- Selective specification --------------------------------------->


apl>costs#(39 19 29) (35 15 29 18 45)


apl>costs#costs,`Z25 16 21 12.5


apl>1 2`Xcosts " s/b 19

19

apl>(1 2 `X costs) # 20


apl>costs

 39 20 29  35 15 29 18 45  25 16 21 12.5 

apl>(a b c)#1 2 3


apl>a,b,c

1 2 3

apl>L#r#2 2 4 R I 16

 1  2  3  4
 5  6  7  8

 9 10 11 12
13 14 15 16


apl>((,r)[1 3 14 16])#'acde'


apl>r

  a  2  c  4 
  5  6  7  8 
             
  9 10 11 12 
 13  d 15  e 

apl>m#'abcde'


apl>((1 0 1 0 1) \ m) # I5 " produces 1 3 5


apl>m

1 3 5

apl>)off