Add Support for "Building Blocks" #7

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1. asterycs commented on Jun 2, 2025

   

   asterycs

   on Jun 2, 2025

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   Hi! For number 3 - would you want to extract the diagonal of an existing matrix or create a new matrix with a vector on the diagonal?

   For 1 and 2 - the internals are now implemented. Vector of ones was needed also for element-wise log. However, the user facing API is missing, I'll add it soon.
2. RoyiAvital commented on Jun 2, 2025

   

   RoyiAvital

   on Jun 2, 2025

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   I guess both.
   Edited to make it clear.
3. RoyiAvital commented on Jun 2, 2025

   

   RoyiAvital

   on Jun 2, 2025

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   I guess the operator Vec() is also needed.
4. asterycs commented on Sep 1, 2025

   

   asterycs

   on Sep 1, 2025

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   All of these are now implemented:

   julia> using DiffMatic
   
   julia> using LinearAlgebra
   
   julia> to_std(gradient(vector(2)' * x, x))
   "vec(2)"
   
   julia> to_std(jacobian(matrix(2) * x, x))
   "mat(2)"
   
   julia> to_std(gradient(diag(A)'*x, x))
   "(A ⊙ I)vec(1)" # same as 'diag(A)', better output is todo
   
   julia> to_std(jacobian(diagm(A*x)*x, x))
   "diagm(Ax)I + diagm(x)A"
   
   julia> to_std(gradient(x' * I * x, x))
   "2x"
   

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5. asterycs

   closed this as completedon Sep 1, 2025