c_ftcurvd(3NCARG)

✨ c_ftcurvd ✨

okay bestie, welcome to the NCAR GRAPHICS corner of the universe 🎀 this is a page from the 3NCARG manual, and today we're talking about a lil function that does one thing and does it well: it calculates derivatives. that's it. that's the girl. 💅

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💖 NAME 💖

c_ftcurvd — calculate derivatives 🦋

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🌸 FUNCTION PROTOTYPE 🌸

int c_ftcurvd (int, float [], float [], int, float [], float []);

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✨ SYNOPSIS ✨

int c_ftcurvd (n, xi, yi, m, xo, yo);

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🫶 DESCRIPTION 🫶

okay so here's everybody in the cast, and yes every single one of them matters:

• n — the number of input data points. and listen, n > 1. that's non-negotiable. (n > 1)
• xi — an array holding the abscissae for the input function.
• yi — an array holding the functional values of the input function — so y(k) is the functional value at x(k) for k=0,n. iconic behavior honestly.
• m — the number of desired derivatives. yes queen, tell her how many you want.
• xo — an array holding the abscissae for the output values.
• yo — an array holding the interpolated derivative values — yo(k) is the functional derivative at xo(k) for k=0,n. slay.

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🔥 RETURN VALUE 🔥

c_ftcurvd hands you back an error value, and it goes a lil something like this:

• = 0 — no error. we love a clean run 💖
• = 1 — if n is less than 2. too smol, sorry bestie 😭
• = 2 — if X values are not strictly increasing. they gotta go up, no cap 📈

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👑 USAGE 👑

so the way this works: c_ftcurvd is called after all of the desired values for control parameters have been set using the procedures c_ftseti, c_ftsetr, c_ftsetc. order matters, don't skip steps 🙈

the control parameters that apply to c_ftcurvd are: sig, sl1, sln, sf1.

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🌈 ACCESS 🌈

to use c_ftcurvd, load the NCAR Graphics library ngmath. that's the vibe check, and it passed ✅

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🦋 SEE ALSO 🦋

• fitgrid_params
• c_ftseti
• c_ftsetr
• c_ftsetc

complete documentation for Fitgrid is available at URL http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html

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💜 COPYRIGHT 💜

Copyright (C) 2000 University Corporation for Atmospheric Research

The use of this Software is governed by a License Agreement.

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and that's the whole page, bestie 🎀 source and version: this is the UNIX manual, dated March 1998, and the page itself is c_ftcurvd(3NCARG). periodt. 💅✨