Provided by: libncarg-dev_6.3.0-6build1_amd64

#### NAME

```       DSPNT2D - Interpolate at a single point (or points) in 2D in double precision

```

#### SYNOPSIS

```       CALL DSPNT2D (N, X, Y, Z, M, XO, YO, ZO, IER)

```

#### DESCRIPTION

```       N           (Integer, Input) - The number of input data points.

X           (Double precision, Input) - An array containing the X coordinates of the input
data points.

Y           (Double precision, Input) - An array containing the Y coordinates of the input
data points.

Z           (Double  precision,  Input) - An array 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,N.

M           (Integer, Input) - The number of output data points (this may be "1").

XO          (Double  precision,  Input)  -  An  array  of  dimension  M  containing  the X
coordinates of the output data. The values in XO may be in any order.

YO          (Double precision,  Input)  -  An  array  of  dimension  M  containing  the  Y
coordinates of the output data. The values in YO may be in any order.

ZO          (Double   precision,  Output)  -  An  array  of  dimension  M  containing  the
interpolated values. ZO(I) is the interpolated value  at  point  (XO(I),YO(I))
for I=1,M.

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
dsgrid_errors for details.

```

#### USAGE

```       This subroutine is called when you want to interpolate at an individual point or points.

```

#### ACCESS

```       To use DSPNT2D, load the NCAR Graphics library ngmath.

```

#### SEEALSO

```       dsgrid, dsgrid_params.

Complete documentation for Dsgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html

```

```       Copyright (C) 2000