Sub2Index.jl

Provides a macro that converts subscripts (Fₙ) to indexing (F[n]).

Installation

On Pkg REPL-mode:

(v1.x) pkg> add https://github.com/antimon2/Sub2Index.jl.git

Example

julia> F = ones(Int, 10);
julia> @_ for n = 3:10 Fₙ = Fₙ₋₁ + Fₙ₋₂ end;
       # equivalent to `for n = 3:10 F[n] = F[n-1] + F[n-2] end`
julia> F
10-element Array{Int64,1}:
  1
  1
  2
  3
  5
  8
 13
 21
 34
 55

 
julia> Π = zeros(Int, (10, 10));
julia> @_ for i = 1:10 Π₍ᵢ₎₍₁₎ = Π₍ᵢ₎₍ᵢ₎ = 1 end;
julia> @_ for i = 3:10, j = 2:i-1 Π₍ᵢ₎₍ⱼ₎ = Π₍ᵢ₋₁₎₍ⱼ₋₁₎ + Π₍ᵢ₋₁₎₍ⱼ₎ end;
julia> Π
10×10 Array{Int64,2}:
 1  0   0   0    0    0   0   0  0  0
 1  1   0   0    0    0   0   0  0  0
 1  2   1   0    0    0   0   0  0  0
 1  3   3   1    0    0   0   0  0  0
 1  4   6   4    1    0   0   0  0  0
 1  5  10  10    5    1   0   0  0  0
 1  6  15  20   15    6   1   0  0  0
 1  7  21  35   35   21   7   1  0  0
 1  8  28  56   70   56  28   8  1  0
 1  9  36  84  126  126  84  36  9  1

Example Notebook

Reference

(Inspired by)