CURVP2(3NCARG)

💖 CURVP2 💖

okay bestie, welcome to CURVP2 from the NCAR GRAPHICS manual — it's a Fortran function that interpolates a periodic function at a specified point ✨ and honestly? she's niche but she works.

✨ SYNOPSIS ✨

FUNCTION CURVP2 (T, N, X, Y, P, YP, SIGMA)

so here's the tea 🫖 — this function interpolates a value at a specified point using a spline under tension. and no, you cannot just roll up and call her, because CURVP1 must be called prior to calling CURVP2, and the values you get from that first call get used as input to CURVP2. it's giving ✨prerequisite✨, it's giving 💅we do things in order in this house💅.

then CURVP2 returns the interpolated function value at the X-coordinate you specified. iconic. no cap. 👑

🌸 DESCRIPTION 🌸

• T (real, input) — the abscissa you want an interpolated function value for. your "where tho" coordinate 🎯
• N (integer, input) — how many input data values you've got. note that N > 1, so one single lonely point is not the vibe, she needs at least two 🥺
• X (real, input) — an array holding the abscissae for your input function.
• Y (real, input) — an array holding the functional values of the input data — Y(K) is the functional value at X(K) for K=1,N. so like, every point's got a buddy, cute 🌸
• X (real, input) — the period of the function. (and yes bestie, the original doc labels this one X too even though the synopsis calls it P 🙈 not me pointing that out, just keeping it 100 with you — this is exactly how it's written down, fr fr)
• YP (real, input) — contains values for the second derivative, as calculated by CURV1. so CURV1 does the homework, CURVP2 copies it 💀
• SIGMA (real, input) — the tension factor. values near zero? that's a cubic spline. large values (like, say, 50)? that's nearly a polygonal line. a typical value is 1. so SIGMA is literally the main character here — she decides the whole vibe check 🌈

🎀 RETURN VALUE 🎀

CURVP2 returns the interpolated value at the specified point T. that's it. that's the whole gift. 🎁

🦋 ACCESS 🦋

to use CURVP2, load the NCAR Graphics library ngmath. periodt. 💅

💜 SEE ALSO 💜

• curvp1
• fitgrid_params

complete documentation for Fitgrid is available at this URL:

http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html

go read it bestie, iykyk 🫶

👑 COPYRIGHT 👑

Copyright (C) 2000 University Corporation for Atmospheric Research

the use of this Software is governed by a License Agreement. ⚠️ so like, read the agreement, she's not optional.

and that's the whole page, bestie!! 💖 this one came from the UNIX manual, dated March 1998, filed under CURVP2(3NCARG) in the NCAR GRAPHICS set — and honestly, for a 1998-era manpage, she ate. slay. ✨🦋🎀💅🌈