lis_matrix_set_ell(3)

💖 lis_matrix_set_ell — bestie edition 💖

okay so this is a page from the Lis Library Functions manual, and today's main character is lis_matrix_set_ell(3). pull up a chair, grab a boba, we're linking arrays to a matrix and it's gonna be so smooth ✨

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✨ NAME ✨

lis_matrix_set_ell — the way you associate the arrays in the ELL format with the matrix. that's it, that's the whole job, and she does it flawlessly 💅

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✨ SYNOPSIS ✨

#include "lis.h"

LIS_INT lis_matrix_set_ell(LIS_INT maxnzr, LIS_INT index[], LIS_SCALAR
value[], LIS_MATRIX A);

like… look at that signature. iconic. no notes 🫶

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✨ DESCRIPTION ✨

so basically you're taking the arrays that live in the ELL format and you're introducing them to matrix A. formally: associate the arrays in the ELL format with matrix A. it's giving matchmaker but for data structures 💖

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✨ INPUT ✨

• maxnzr — the maximum number of nonzero elements in each row. the ceiling, the limit, the "no row gets more than this many" energy 👑
• index, value — the arrays in the ELL format. the actual goods. the whole point of the function tbh 🌸
• A — the matrix. she's the one getting the arrays attached to her ✨

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✨ OUTPUT ✨

• A — the matrix, now associated with the arrays. glow up complete 💅

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✨ EXIT STATUS ✨

here's what she hands back to you:

• 0 — the process is normally terminated. everything slayed, no crumbs 🌈
• unspecified — an error occurred 😭 (we don't know which one, she's being mysterious, and ngl that's a little stressful)

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✨ NOTE ✨

okay listen. this part is not optional. after lis_matrix_set_ell is called, you must call lis_matrix_assemble. no skipping, no "I'll do it later", no "surely it's fine". it is not fine. call it. periodt 💀

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✨ SEE ALSO ✨

• lis(3) — the mothership 👑
• http://www.ssisc.org/lis/ — go say hi to the website 🦋

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and that's the whole page bestie!! this was written up under Man Page, dated 6 Sep 2012, and it's from the Lis Library Functions manual, section lis_matrix_set_ell(3). mwah, go call lis_matrix_assemble, ily, bye 💖✨🎀