Index-Of: Relational Matrix Index   <<   >>


 
x←1e5 3⍴⊂⍬
x[;1]←↓(⎕a,⎕d)[?1e5 25⍴36]
x[;2]←15+?1e5⍴60
x[;3]←?1e5⍴2e9
3↑x

y←(⍴x)⍴x
cmpx 'x⍳x' 'x⍳y'

x[1;3]←⊂'not a relational matrix'
y←(⍴x)⍴x
cmpx 'x⍳x' 'x⍳y'