Down Arrow (↓)

↓ 𝕩: Suffixes

Suffixes of array 𝕩 along its first axis.

       ↓ 1‿2‿3‿4
⟨ ⟨ 1 2 3 4 ⟩ ⟨ 2 3 4 ⟩ ⟨ 3 4 ⟩ ⟨ 4 ⟩ ⟨⟩ ⟩

       a ← 3‿3 ⥊ ↕9

       ↓ a
┌─                                    
· ┌─        ┌─        ┌─        ↕0‿3  
  ╵ 0 1 2   ╵ 3 4 5   ╵ 6 7 8         
    3 4 5     6 7 8           ┘       
    6 7 8           ┘                 
          ┘                           
                                     ┘

𝕨 ↓ 𝕩: Drop

For each integer in 𝕨, drop that many elements from the beginning of each dimension of 𝕩.

Negative numbers drop from the end.

       3 ↓ 1‿3‿5‿67
⟨ 67 ⟩

       b ← 4‿4 ⥊ ↕16

       3‿3 ↓ b
┌─    
╵ 15  
     ┘

       5‿5 ↓ b
┌┐
└┘


       3‿¯3 ↓ b
┌─    
╵ 12  
     ┘