lis_array_matvec(3)

💖 lis_array_matvec(3) 💖

okay bestie, welcome to the Lis Library Functions corner of the manual, where we're about to make a matrix and a vector kiss and produce a brand new vector. it's giving math but make it cute ✨

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✨ NAME ✨

lis_array_matvec — calculate the matrix vector product 🧮💅

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🌸 SYNOPSIS 🌸

#include "lis.h"

LIS_INT lis_array_matvec(LIS_INT n, LIS_SCALAR a[], LIS_SCALAR x[],
LIS_SCALAR y[], LIS_INT op);

like yes she takes five arguments and she eats every single time 🫶

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🦋 DESCRIPTION 🦋

she calculates the matrix-vector product Ax. that's it, that's the whole job, and she does it flawlessly no cap 💯

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🎀 INPUT 🎀

• n — the size of the matrix and the vectors. everyone's matching, it's a vibe check 🌈
• a — the array that stores matrix A, of size n * n. yes queen, she's holding the whole matrix 🍓
• x — the array that stores vector x, of size n 👑
• y — the array that stores vector y, of size n 💜
• op — the operation selector, and this one decides what actually goes down:
  • LIS_INS_VALUE — y = Ax. she overwrites y with the product, main character energy, out with the old 📝✨
  • LIS_SUB_VALUE — y = y - Ax. she subtracts the product from whatever y already had going on, lowkey iconic 😌

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⭐ OUTPUT ⭐

• y — y. that's the answer bestie, that's the whole point 🎉

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💀 EXIT STATUS 💀

here's what she returns when she's done:

• 0 — the process is normally terminated. slay, no notes 🥳
• unspecified — an error occurred. not me manifesting an error… if this happens, something went wrong and the manual is simply not going to elaborate 🙈

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🔥 SEE ALSO 🔥

• lis(3)
• http://www.ssisc.org/lis/

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and that's the page!! this was the Man Page for lis_array_matvec(3), dated 3 Dec 2014, from the Lis Library Functions collection 💖 go forth and multiply (matrices) bestie, ily, bye 🫶✨🎀