lis_input(3)

💖 lis_input(3) — it's giving "Lis Library Functions", bestie 💖

okay so this is lis_input, a function from the Lis Library Functions set, and it's the one that pulls your matrix and vector data in from a file. no cap, it's the "let me read your homework" of the Lis world. 🎀

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✨ NAME ✨

lis_input — read the matrix and vector data 📖💅

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🌸 SYNOPSIS 🌸

#include "lis.h"

LIS_INT lis_input(LIS_MATRIX A, LIS_VECTOR b, LIS_VECTOR x, char *filename);

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🦋 DESCRIPTION 🦋

Read the matrix and vector data from the external file. that's it, that's the whole vibe. it goes out, finds your file, and brings the numbers home. 🏡✨

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🍓 INPUT 🍓

• filename — the source file. literally the file you're reading from, the main character of this whole operation. 👑

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👑 OUTPUT 👑

• A — the matrix, in the specified storage format. it comes back all dressed up in whatever format you asked for. 💃
• b — the right hand side vector. yes bestie, that one.
• x — the solution. the answer, the payoff, the slay. 🌟

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💀 EXIT STATUS 💀

the following exit values are returned, and you will be checking them, fr fr:

• 0 — the process is normally terminated. we love a clean exit. 🫶
• unspecified — an error occurred. not the vibe. something went wrong and it's telling you with a whole non-zero number. 😭

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🧚 NOTE 🧚

the following file formats are supported, and this is important so don't skip it:

• the extended Matrix Market format (extended to allow vector data) ✨
• the Harwell-Boeing format 🌈

that's it — those two. don't show up with some third format and expect it to work, because it will simply not eat. 💅

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🔥 SEE ALSO 🔥

• lis(3)
• http://www.ssisc.org/lis/

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and that's the whole page, bestie!! go read those files, get that matrix, exit with a 0, and be iconic about it. this was the lis_input(3) page from the Lis Library Functions collection, dated 6 Sep 2012 — mwah, periodt. 💖✨🎀🦋