lis_array_xpay(3f)

💖 lis_array_xpay — the "just add a lil bit of x to y" function 💖

okay bestie, welcome to the Lis Library Functions corner of the manual, this is lis_array_xpay(3f) and she is so much simpler than her name makes her sound, i promise 🫶

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✨ NAME ✨

lis_array_xpay — calculate the sum of the vectors 💫

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🌸 SYNOPSIS 🌸

subroutine lis_array_xpay(LIS_INTEGER n, LIS_SCALAR x(), LIS_SCALAR
alpha, LIS_SCALAR y(), LIS_INTEGER ierr);

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🦋 DESCRIPTION 🦋

bestie. listen. she calculates the sum of the vectors:

y = x + alpha * y

that's it. that's the whole vibe. you hand her some vectors and a scalar, she does the lil math, and she puts the answer right back in y. main character energy tbh 👑

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🎀 INPUT 🎀

• n — the size of the vectors. like, how many numbers are we talking here, girlie? that many. 📏
• alpha — the scalar value. this is the lil multiplier that makes it spicy 🌶️
• x, y — the arrays that store the vectors. these are the actual data, no cap 💅

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⭐ OUTPUT ⭐

• y — gets x + alpha * y written all over it. yes literally, vector y is overwritten, so if you were attached to the old y… she's gone bestie 😭🙈

not me warning you twice: y is overwritten. the original contents do NOT survive this. periodt.

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👑 SEE ALSO 👑

• lis(3)
• http://www.ssisc.org/lis/

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that's the whole page, no filler, ate and left no crumbs 🍓

and for the cute sign-off: this lil masterpiece is from the Lis Library Functions manual, dated 3 Dec 2014, filed under Man Page for lis_array_xpay(3f) 💜✨🧚