lis_matrix_set_msr(3f)

💖 lis_matrix_set_msr — bestie edition 💖

okay so this is a page from the Lis Library Functions manual, and it's literally about handing your MSR-format arrays over to a matrix. iykyk 🫶

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✨ NAME ✨

lis_matrix_set_msr — associate the arrays in the MSR format with the matrix

no cap, that's the whole job description. it takes your arrays and goes "these? yeah, they belong to this matrix now." 💅

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🌸 SYNOPSIS 🌸

subroutine lis_matrix_set_msr(LIS_INTEGER nnz, LIS_INTEGER ndz[],
LIS_INTEGER index[], LIS_SCALAR value[], LIS_MATRIX A, LIS_INTEGER ierr);

look at her. six arguments, one job. iconic.

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🦋 DESCRIPTION 🦋

Associate the arrays in the MSR format with matrix A.

that's it. that's the whole vibe. you show up with your arrays, you show up with your matrix, and now they're linked. main character energy fr fr 💜

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🎀 INPUT 🎀

• nnz — The number of nonzero elements. like, how many actual things are in there.
• ndz — The number of nonzero elements in the diagonal. yes, the diagonal gets its own count. she's special. 👑
• ptr, index, value — The arrays in the MSR format. this is the trio. the squad. the whole point of the function. 💖
• A — The matrix. the one receiving all of this attention.

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🌈 OUTPUT 🌈

• A — The matrix associated with the arrays. she came in as just a matrix and left with ARRAYS. glow up. ✨

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⭐ NOTE ⭐

After lis_matrix_set_msr is called, the function lis_matrix_assemble must be called.

not me stressing this enough: you are not done yet. setting is step one. lis_matrix_assemble is step two. skipping it is giving unfinished business and the matrix will simply not be ready. don't do that to her. 😭

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👑 SEE ALSO 👑

• lis(3)
• http://www.ssisc.org/lis/

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that's the whole page bestie, go forth and assemble 🧚💖

sign-off time: this lil masterpiece came off the Lis Library Functions shelf, dated 6 Sep 2012, and it lives under the name lis_matrix_set_msr(3f) — so if you cite her, cite her right. 💅🌸🦋