NATGRIDD(3NCARG)

✨ NATGRIDD ✨ (a.k.a. NATGRIDD(3NCARG) from the NCAR GRAPHICS fam)

okay bestie, so this is the primary double precision Fortran entry for natural neighbor gridding 💅 and honestly? she's iconic. this page lives in the NCAR Graphics manual and it's about to be your whole personality.

🌸 SYNOPSIS 🌸

CALL NATGRIDD (NPNTS, X, Y, Z, NUMXOUT, NUMYOUT, XI, YI, ZI, IER)

that's the whole vibe. one call, ten arguments, no cap. 🫶

💖 DESCRIPTION 💖

so here's the tea on every single argument, and yes, we're doing all of them:

• NPNTS — (Integer, Input) the number of input data points. and listen, NPNTS > 3. the original literally wrote that in parens. so four or more, bestie. don't try it with three. 🙈
• X — (Double precision, Input) an array holding the X coordinates of your input data points. 📍
• Y — (Double precision, Input) an array holding the Y coordinates of your input data points. 📍
• Z — (Double precision, Input) an array holding the functional values of your input data points. translation: Z(L) is the value of the input function at coordinate (X(L),Y(L)), for L=1,NPNTS. so for every L from 1 to NPNTS, X, Y and Z all line up like a lil trio. 🎀
• NUMXOUT — (Integer, Input) how many X values are chillin' in your output grid.
• NUMYOUT — (Integer, Input) how many Y values are chillin' in your output grid.
• XI — (Double precision, Input) an array of dimension NUMXOUT holding the X coordinates of the output data grid. the values in XI must be increasing, but they don't have to be equally spaced — she's flexible like that. ✨
• YI — (Double precision, Input) an array of dimension NUMYOUT holding the Y coordinates of the output data grid. same rule: the values in YI must be increasing, but not necessarily equally spaced. 💫
• ZI — (Double precision, Output) a two-dimensional array of dimension NUMXOUT x NUMYOUT holding the interpolated functional values. specifically, ZI(I,J) is the interpolated value at grid point (XI(I),YI(J)). this is the moment. this is the main character. 👑
• IER — (Integer, Output) the error return value. if IER comes back as 0, then no errors were detected — slay, clean run, we love to see it. 🌈 if IER is non-zero, then go read the man page for natgrid_errors for the details, because that's where the receipts live. 👀

🦋 USAGE 🦋

NATGRIDD is the double precision gridding function in the Natgrid package. periodt. 💅

the behavior of NATGRIDD is controlled by values set for the various parameters described over in natgrid_params. and how do you set those values, you ask? with the subroutines NNSETI, NNSETRD, and NNSETC. that's the whole flow. iykyk. 🧚

🌟 ACCESS 🌟

to use NATGRIDD, load the NCAR Graphics library ngmath. that's it, that's the step. 🔥

👑 SEE ALSO 👑

go read these next, bestie, they're all part of the lore:

• natgrid
• natgrid_params
• nnseti
• nngeti
• nnsetrd
• nngetrd
• nnsetc
• nngetc

also!! complete documentation for Natgrid is available at this URL, copy it exactly:

http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html

💜 COPYRIGHT 💜

Copyright (C) 2000
University Corporation for Atmospheric Research

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

real talk bestie: this isn't a "do whatever" situation — the use of this Software is governed by a License Agreement, so check it before you go wild. 💀

and that's the page!! 🌸🦋💖 this was NATGRIDD(3NCARG) from NCAR GRAPHICS, dated March 1997-1998, living in the UNIX manual section. go forth and grid naturally, queen. 🎀👑✨