Provided by: libncarg-dev_6.3.0-6build1_amd64

**NAME**

NNPNTINITD- Enter single point mode in double precision

**SYNOPSIS**

CALL NNPNTINITD (NPNTS, X, Y, Z)

**DESCRIPTION**

NPNTS (Integer, Input) - The number of input data points. (NPNTS > 3). X (Double precison, Input) - An array of dimension NPNTS containing the X coordinates of the input data points. Y (Double precison, Input) - An array of dimension NPNTS containing the Y coordinates of the input data points. Z (Double precison, Input) - An array of dimension NPNTS containing the functional values of the input data points. That is, Z(L) is the value of the input function at coordinate (X(L),Y(L)), for L=1,NPNTS.

**USAGE**

This subroutine is called when you want to interpolate at individal points. It is an initialization routine that sets up some internal variables and does this initial triangulation. To actually do the interplation, use subroutine NNPNTD. To terminate single point mode, use the subroutine NNPNTENDD.

**ACCESS**

To use NNPNTINITD, load the NCAR Graphics library ngmath.

**SEE** **ALSO**

natgrid, natgrid_params, natgridd, nnpntd, 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.