lis_matrix_scale(3f)

💖 NAME 💖

lis_matrix_scale — bestie, this one scales the matrix. that's the whole vibe ✨

🎀 SYNOPSIS 🎀

subroutine lis_matrix_scale(LIS_MATRIX A, LIS_VECTOR b, LIS_VECTOR d,
       LIS_INTEGER action, LIS_INTEGER ierr);

ok so you call it like that, no cap. 💅

🌸 DESCRIPTION 🌸

Scale matrix A. that's it, that's the job. she's a scaler, she scales. 🦋

✨ INPUT ✨

• i — the row number of the matrix, fr fr 📍
• j — the column number of the matrix 🗺️
• value — the scalar value to be assigned 🍓
• A — the matrix 👑
• b — the vector 🧚
• action — okay so this is the main character of the whole operation, pick one:
  • LIS_SCALE_JACOBI — Jacobi scaling, which is literally D^-1 A x = D^-1 b, where D represents the diagonal of A=(a_ij) 💀
  • LIS_SCALE_SYMM_DIAG — diagonal scaling, which is D^-1/2 A D^-1/2 x = D^-1/2 b, where D^-1/2 represents the diagonal matrix with (a_ii)^-1/2 as the diagonal 🌈

💜 OUTPUT 💜

• d — the vector which stores the diagonal elements of D^-1 or D^-1/2. she's holding the receipts for whichever action you picked 🫶

🌟 SEE ALSO 🌟

• lis(3)
• http://www.ssisc.org/lis/

and that's the page bestie, tysm for reading 💖 this one lives in the Lis Library Functions and it's dated 28 Aug 2014 — yeah she's an icon from way back, still slaying, still scaling ✨ bye ily! 🎀