ncl_shgrid (3) - Linux Manuals

ncl_shgrid: interpolate random data in 3-space using a modified Shepard's algorithm

NAME

SHGRID - interpolate random data in 3-space using a modified Shepard's algorithm

SYNOPSIS

CALL SHGRID (N, X, Y, Z, F, NXO, NYO, NZO, XO, YO, ZO,

      FF, IWK, RWK, IER)

DESCRIPTION

N

(integer,input) The number of input data points (N > 9).

X

(real, input) An array containing the X coordinates of the input data points. X is dimensioned for N.

Y

(real, input) An array containing the Y coordinates of the input data points. Y is dimensioned for N.

Z

(real, input) An array containing the Z coordinates of the input data points. Z is dimensioned for N.

F

(real, input) Array dimensioned for N containing data values. F(I) is a functional value at (X(I),Y(I),Z(I)) for I = 1 to N.

NXO

(integer, input) The number of X coordinate values in the output grid.

NYO

(integer, input) The number of Y coordinate values in the output grid.

NZO

(integer, input) The number of Z coordinate values in the output grid.

XO

(real, input) An array dimensioned for NXO containing the X coordinates of the output surface.

YO

(real, input) An array dimensioned for NYO containing the Y coordinates of the output surface.

ZO

(real, input) An array dimensioned for NZO containing the Y coordinates of the output surface.

FF

(real, output) An array dimensioned for NXO x NYO x NZO containing the calculated function values for the output function. FF(I,J,K) is the calculated functional value at (XO(I), YO(J), ZO(K)) for I=1,NXO and J=1,NYO and K=1,NZO.

IRK

(integer, input) An integer workspace of length at least 2*N.

RWK

(real, input) A work array dimensioned for 11*N+6.

IER

(integer, output) An error return value. If IER is returned as 0, then no errors were detected. If IER is non-zero, then refer to the man page for shgrid_errors for details.

USAGE

SHGRID is called to interpolate randomly spaced data in 3-space. SHGRID uses a modified Shepard's algorithm to construct an interpolatory surface.

ACCESS

To use SHGRID, load the NCAR Graphics library ngmath.

COPYRIGHT

Copyright (C) 2000
University Corporation for Atmospheric Research

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