lis_vector_axpy(3f)

✨ lis_vector_axpy ✨

okay bestie so this is a page from the Lis Library Functions section of the manual — it's lis_vector_axpy(3f), and it's literally just here to tell you how to add a scaled vector onto another vector. no cap, it's a tiny little icon 💅

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🌸 NAME 🌸

lis_vector_axpy — calculate the sum of the vectors 🫶

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🎀 SYNOPSIS 🎀

subroutine lis_vector_axpy(LIS_SCALAR alpha, LIS_VECTOR x, LIS_VECTOR y,
LIS_INTEGER ierr);

that's it. that's the whole call. so cute, so simple 💖

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💜 DESCRIPTION 💜

Calculate the sum of the vectors, and the exact vibe is:

y = alpha * x + y

so like, you take x, you scale it by alpha, and you dump the result on top of y. it's giving classic axpy energy, iykyk 🔥

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🦋 INPUT 🦋

• alpha — The scalar value. that's the number you're multiplying x by, bestie. yes, it's a scalar, not a vector, don't panic ✨
• x, y — The vectors. the two vectors doing the whole little math dance together 💃

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🌈 OUTPUT 🌈

• y — alpha * x + y (vector y is overwritten)

not me reminding you that y gets overwritten — like, the original y you passed in? gone. replaced. it's the new y now. if you needed the old one, you should've kept a copy, bestie 😭

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💀 SEE ALSO 💀

• lis(3)
• http://www.ssisc.org/lis/

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and that's the whole page!! 🎀💖✨ source/version is the Lis Library Functions manual, dated 6 Sep 2012 — so like, this page has been serving axpy realness since 2012 and honestly? iconic. periodt 👑💅