SGET04(3)

🌸 NAME

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/sget04.f

Okay bestie, this is the SGET04(3) page — specifically the sget04.f(3) manpage from the Library Functions Manual. And yes, the whole path above is literally the NAME. We are not editing it. Periodt. 💅

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✨ SYNOPSIS ✨

🛠️ Functions/Subroutines

subroutine SGET04 (n, nrhs, x, ldx, xact, ldxact, rcond, resid)
    SGET04

🧚 Function/Subroutine Documentation 🧚

subroutine SGET04 (integer n, integer nrhs, real, dimension( ldx, * ) x,
    integer ldx, real, dimension( ldxact, * ) xact, integer ldxact, real
    rcond, real resid)

This one is SGET04, no cap. 🫶

🎯 Purpose

SGET04 computes the difference between a computed solution and the true solution to a system of linear equations. It’s giving math-girl main character energy. 😭✨

Here’s the exact formula vibe:

RESID =  ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ),

where RCOND is the reciprocal of the condition number and EPS is the machine epsilon. 💖

🧾 Parameters

• N — N is INTEGER; it’s the number of rows of the matrices X and XACT. N >= 0. 🌸
• NRHS — NRHS is INTEGER; it’s the number of columns of the matrices X and XACT. NRHS >= 0. 🦋
• X — X is a REAL array, dimension (LDX,NRHS); these are the computed solution vectors, and each vector is stored as a column of the matrix X. 💅
• LDX — LDX is INTEGER; it’s the leading dimension of the array X. LDX >= max(1,N). 🔥
• XACT — XACT is a REAL array, dimension ( LDX, NRHS ); these are the exact solution vectors, and each vector is stored as a column of the matrix XACT. 👑
• LDXACT — LDXACT is INTEGER; it’s the leading dimension of the array XACT. LDXACT >= max(1,N). 🌈
• RCOND — RCOND is REAL; it’s the reciprocal of the condition number of the coefficient matrix in the system of equations. ⭐
• RESID — RESID is REAL; it’s the maximum over the NRHS solution vectors of ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ). 💀

👑 Author

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 101 of file sget04.f.

👑 Author

Generated automatically by Doxygen for LAPACK from the source code.

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💖 That’s the whole page, bestie — the footer has LAPACK Version 3.12.0 and /home/abui...IN/sget04.f(3). Iconic. 🎀