lis_array_matvec_ns(3f)

✨ NAME ✨

lis_array_matvec_ns — bestie, it calculates the matrix vector product 💖 (this is the 3f one, the Fortran girlies' page)

🌸 SYNOPSIS 🌸

subroutine lis_array_matvec_ns(LIS_INTEGER m, LIS_INTEGER n, LIS_SCALAR
a(), LIS_INTEGER lda, LIS_SCALAR x(), LIS_SCALAR y(), LIS_INTEGER op,
LIS_INTEGER ierr);

🦋 DESCRIPTION 🦋

Okay so here's the vibe: this routine calculates the matrix-vector product Ax — but plot twist, the matrix A is not square. Not a square, not a cube, not a rhombus, just a rectangle doing its thing 💅

🎀 INPUT 🎀

• m, n — the size of the matrix and the vectors, the little dimension duo 👑
• a — the array that stores matrix A, and its size is m * n
• x — the array that stores vector x, size n 🌸
• y — the array that stores vector y, size m
• op — the operation, pick your fighter:
  • LIS_INS_VALUE — y = Ax
  • LIS_SUB_VALUE — y = y - Ax

🌈 OUTPUT 🌈

• y — y 🫶 (yes bestie, it hands you back your y, no cap)

👑 SEE ALSO 👑

• lis(3)
• http://www.ssisc.org/lis/

ngl that's the whole page, go forth and multiply (matrices, specifically) 🔥

kisses, this was the Lis Library Functions page, rendered as a man page on 3 Dec 2014 — mwah, stan 💜