# ncl_nnpntd man page

NNPNTD- Interpolate at a single point in double precision

## Synopsis

CALL NNPNTD (X, Y, Z)

## Description

- X
(Double precision, Input) - The X coordinate of the point where interpolation is desired.

- Y
(Double precision, Input) - The Y coordinate of the point where interpolation is desired.

- Z
(Double precision, Output) - The interpolated functional value at the point (X,Y).

## Usage

This subroutine is called when you want to interpolate at an individal point. NNPNTINITD must be called prior to calling NNPNTD and NNPNTENDD must be called to terminate single point mode.

## Access

To use NNPNTD, load the NCAR Graphics library ngmath.

## See Also

natgrid, natgrid_params, natgridd, nnpntinitd, nnpntendd.

Complete documentation for Natgrid is available at URL

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.