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netcdf_utils.cpp
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#include <string>
#include <netcdfcpp.H>
#include <cstdlib>
#include <vector>
using namespace std;
int netcdf_mpas_read_dim ( string filename, string dim_name ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_DIM gets the size of the dimension with name dim_name
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 29 December 2010
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, string DIM_NAME, the name of the dimension in question
//
// Output, int NETCDF_MPAS_READ_DIM, the value of the dimension.
//
int ntime;
long int dim_size;
NcDim *dim_id;
bool valid;
string tmp_name;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get Ntime, which is a NETCDF dimension.
//
valid = false;
for(int i = 0; i < ncid.num_dims() && !valid; i++){
tmp_name = ncid.get_dim(i)->name();
if(dim_name == tmp_name){
valid = true;
}
}
if(valid){
dim_id = ncid.get_dim(dim_name.c_str());
dim_size = (*dim_id).size ( );
} else {
dim_size = 1;
}
//
// Close the file.
//
ncid.close ( );
ntime = ( int ) dim_size;
return ntime;
}/*}}}*/
//****************************************************************************80
int netcdf_mpas_read_num_vars(string filename){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_NUM_VARS gets the number of variables in the netcdf file
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 29 December 2010
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Output, int NETCDF_MPAS_READ_NUM_VARS, the number of variables
//
long int var_size;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get Ntime, which is a NETCDF dimension.
//
var_size = ncid.num_vars();
ncid.close();
return var_size;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_xyzcell ( string filename, int ncells, double xcell[], double ycell[], double zcell[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_XYZCELL reads xCell, yCell, zCell.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 29 December 2010
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NCELLS, the number of nodes.
//
// Output, double XCELL[NCELLS], YCELL[NCELLS], ZCELL[NCELLS], the
// coordinates of the nodes.
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "xCell" );
(*var_id).get ( &xcell[0], ncells );
var_id = ncid.get_var ( "yCell" );
(*var_id).get ( &ycell[0], ncells );
var_id = ncid.get_var ( "zCell" );
(*var_id).get ( &zcell[0], ncells );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_xyzvertex ( string filename, int nvertices, double xvertex[], double yvertex[], double zvertex[] ){/*{{{*/
//****************************************************************************80
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_CELLS gets the cell center coordinates.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 January 2011
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NVERTICES, the number of vertices.
//
// Output, double XVERTEX[NVERTICES], YVERTEXL[NVERTICES],
// ZVERTEX[NVERTICES], the coordinates of the nodes.
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "xVertex" );
(*var_id).get ( &xvertex[0], nvertices );
var_id = ncid.get_var ( "yVertex" );
(*var_id).get ( &yvertex[0], nvertices );
var_id = ncid.get_var ( "zVertex" );
(*var_id).get ( &zvertex[0], nvertices );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_xyzedge ( string filename, int nedges, double xedge[], double yedge[], double zedge[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_EDGES gets the edge midpoint coordinates.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 January 2011
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NEDGES, the number of edges.
//
// Output, double XEDGE[NEDGES], YEDGE[NEDGES],
// ZEDGE[NEDGES], the coordinates of the edge midpoints.
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "xEdge" );
(*var_id).get ( &xedge[0], nedges );
var_id = ncid.get_var ( "yEdge" );
(*var_id).get ( &yedge[0], nedges );
var_id = ncid.get_var ( "zEdge" );
(*var_id).get ( &zedge[0], nedges );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_verticesoncell ( string filename, int maxedges, int ncells, int verticesOnCell[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_VERTICESONCELLS gets verticesOnCells.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 January 2011
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int MAXEDGES, the maximum number of edges for a cell.
//
// Input, int NCELLS, the number of cells.
//
// Output, int VERTICESONCELLS[MAXEDGES*NCELLS];
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "verticesOnCell" );
(*var_id).get ( &verticesOnCell[0], ncells, maxedges );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_verticesonedge ( string filename, int nedges, int verticesonedge[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_VERTICESONEDGE gets the verticesOnEdge information.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NEDGES, the number of edges.
//
// Output, int VERTICESONEDGE[2*NEDGES];
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "verticesOnEdge" );
(*var_id).get ( &verticesonedge[0], nedges, 2 );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_cellsonvertex ( string filename, int nvertices, int cellsonvertex[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_CELLSONVERTEX gets the cellsOnVertex information.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NEDGES, the number of edges.
//
// Output, int CELLSONVERTEX[3*NVERTICES];
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "cellsOnVertex" );
(*var_id).get ( &cellsonvertex[0], nvertices, 3 );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_cellsonedge ( string filename, int nedges, int cellsonedge[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_CELLSONEDGE gets the cellsOnEdge information.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NEDGES, the number of edges.
//
// Output, int CELLSONEDGE[2*NEDGES];
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "cellsOnEdge" );
(*var_id).get ( &cellsonedge[0], nedges, 2 );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
void netcdf_mpas_read_nedgesoncell ( string filename, int ncells, int nedgesoncell[] ){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_READ_NEDGESONCELLS gets nedgesOnCells.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 January 2011
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int NCELLS, the number of cells.
//
// Output, int NEDGESONCELLS[NCELLS];
//
NcVar *var_id;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var ( "nEdgesOnCell" );
(*var_id).get ( &nedgesoncell[0], ncells );
//
// Close the file.
//
ncid.close ( );
return;
}/*}}}*/
//****************************************************************************80
int netcdf_mpas_list_ncell_fields(string filename){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_LIST_NCELL_FIELDS lists all fields that are printable based on nCells
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
NcVar *var_id;
NcDim *ncell_dim, *nvert_dim, *nedge_dim;
NcToken ncell_tok, nvert_tok, nedge_tok;
NcToken dim_name;
vector<NcToken> var_names;
vector<int> var_ids;
string name;
int included;
int has_ncells;
int num_vars;
int num_dims;
int i;
int j;
int valid = 0;
int choice = 0;
vector<string> excluded_vars;
excluded_vars.push_back("xCell");
excluded_vars.push_back("yCell");
excluded_vars.push_back("zCell");
excluded_vars.push_back("latCell");
excluded_vars.push_back("lonCell");
excluded_vars.push_back("indexToCellID");
excluded_vars.push_back("edgesOnCell");
excluded_vars.push_back("cellsOnCell");
excluded_vars.push_back("localVerticalUnitVectors");
excluded_vars.push_back("verticesOnCell");
num_vars = ncid.num_vars();
ncell_dim = ncid.get_dim("nCells");
ncell_tok = ncell_dim->name();
nvert_dim = ncid.get_dim("nVertices");
nvert_tok = nvert_dim->name();
nedge_dim = ncid.get_dim("nEdges");
nedge_tok = nedge_dim->name();
for(i = 0; i < num_vars; i++){
var_id = ncid.get_var(i);
num_dims = var_id->num_dims();
included = 1;
name = var_id->name();
for(j = 0; j < excluded_vars.size(); j++){
if(excluded_vars.at(j) == name){
included = 0;
}
}
if(included){
has_ncells = 0;
for(j = 0; j < num_dims; j++){
dim_name = (var_id->get_dim(j))->name();
if(ncell_tok == dim_name){
has_ncells = 1;
}
}
if(has_ncells){
var_names.push_back(var_id->name());
var_ids.push_back(i);
}
}
}
valid = 0;
if(var_names.empty()){
cout << endl;
cout << "No variables indexed by nCells to color with." << endl;
}
while(!valid && !var_names.empty()){
cout << endl;
cout << "Available variables indexed by nCells." << endl;
for(i = 0; i < var_names.size(); i++){
cout << var_ids.at(i) << "\t" << var_names.at(i) << ":\t";
num_dims = ncid.get_var(var_ids.at(i))->num_dims();
for(j = 0; j < num_dims-1; j++){
cout << ncid.get_var(var_ids.at(i))->get_dim(j)->name() << "*";
}
cout << ncid.get_var(var_ids.at(i))->get_dim(num_dims-1)->name() << endl;
}
cout << endl << endl;
cout << "Enter the number of the field you would like to print" << endl;
cout << "Choose from list above, or enter 0 for default:" << endl;
cin >> choice;
for(i = 0; i < var_ids.size(); i++){
if(var_ids.at(i) == choice){
valid = 1;
}
}
if(choice == 0){
valid = 1;
}
}
return choice;
}/*}}}*/
//****************************************************************************80
int netcdf_mpas_list_nvertex_fields(string filename){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_LIST_NVERTEX_FIELDS lists all fields that are printable based on nVertices
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
NcVar *var_id;
NcDim *ncell_dim, *nvert_dim, *nedge_dim;
NcToken ncell_tok, nvert_tok, nedge_tok;
NcToken dim_name;
string name;
vector<NcToken> var_names;
vector<int> var_ids;
int included;
int has_nverts;
int num_vars;
int num_dims;
int i;
int j;
int choice = 0;
int valid = 0;
vector<string> excluded_vars;
excluded_vars.push_back("xVertex");
excluded_vars.push_back("yVertex");
excluded_vars.push_back("zVertex");
excluded_vars.push_back("latVertex");
excluded_vars.push_back("lonVertex");
excluded_vars.push_back("indexToVertexID");
excluded_vars.push_back("edgesOnVertex");
excluded_vars.push_back("cellsOnVertex");
excluded_vars.push_back("kiteAreasOnVertex");
excluded_vars.push_back("verticesOnVertex");
excluded_vars.push_back("kiteAreaVertex");
num_vars = ncid.num_vars();
ncell_dim = ncid.get_dim("nCells");
ncell_tok = ncell_dim->name();
nvert_dim = ncid.get_dim("nVertices");
nvert_tok = nvert_dim->name();
nedge_dim = ncid.get_dim("nEdges");
nedge_tok = nedge_dim->name();
for(i = 0; i < num_vars; i++){
var_id = ncid.get_var(i);
num_dims = var_id->num_dims();
included = 1;
name = var_id->name();
for(j = 0; j < excluded_vars.size(); j++){
if(excluded_vars.at(j) == name){
included = 0;
}
}
if(included){
has_nverts = 0;
for(j = 0; j < num_dims; j++){
dim_name = (var_id->get_dim(j))->name();
if(nvert_tok == dim_name){
has_nverts = 1;
}
}
if(has_nverts){
var_names.push_back(var_id->name());
var_ids.push_back(i);
}
}
}
valid = 0;
if(var_names.empty()){
cout << endl;
cout << "No variables indexed by nVertices to color with." << endl;
}
while(!valid && !var_names.empty()){
cout << endl;
cout << "Available variables indexed by nVertices." << endl;
for(i = 0; i < var_names.size(); i++){
cout << var_ids.at(i) << "\t" << var_names.at(i) << ":\t";
num_dims = ncid.get_var(var_ids.at(i))->num_dims();
for(j = 0; j < num_dims-1; j++){
cout << ncid.get_var(var_ids.at(i))->get_dim(j)->name() << "*";
}
cout << ncid.get_var(var_ids.at(i))->get_dim(num_dims-1)->name() << endl;
}
cout << endl << endl;
cout << "Enter the number of the field you would like to print" << endl;
cout << "Choose from list above, or enter 0 for default:" << endl;
cin >> choice;
for(i = 0; i < var_ids.size(); i++){
if(var_ids.at(i) == choice){
valid = 1;
}
}
if(choice == 0){
valid = 1;
}
}
return choice;
}/*}}}*/
//****************************************************************************80
int netcdf_mpas_list_nedge_fields(string filename){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_LIST_NEDGE_FIELDS lists all fields that are printable based on nEdges
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 30 December 2010
//
// Author:
//
// Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
NcVar *var_id;
NcDim *ncell_dim, *nvert_dim, *nedge_dim;
NcToken ncell_tok, nvert_tok, nedge_tok;
NcToken dim_name;
string name;
vector<NcToken> var_names;
vector<int> var_ids;
int included;
int has_nedges;
int num_vars;
int num_dims;
int i;
int j;
int choice = 0;
int valid = 0;
vector<string> excluded_vars;
excluded_vars.push_back("xEdge");
excluded_vars.push_back("yEdge");
excluded_vars.push_back("zEdge");
excluded_vars.push_back("latEdge");
excluded_vars.push_back("lonEdge");
excluded_vars.push_back("indexToEdgeID");
excluded_vars.push_back("cellsOnEdge");
excluded_vars.push_back("edgesOnEdge");
excluded_vars.push_back("edgeNormalVectors");
excluded_vars.push_back("cellTangentPlane");
excluded_vars.push_back("weightsOnEdge");
excluded_vars.push_back("verticesOnEdge");
num_vars = ncid.num_vars();
ncell_dim = ncid.get_dim("nCells");
ncell_tok = ncell_dim->name();
nvert_dim = ncid.get_dim("nVertices");
nvert_tok = nvert_dim->name();
nedge_dim = ncid.get_dim("nEdges");
nedge_tok = nedge_dim->name();
for(i = 0; i < num_vars; i++){
var_id = ncid.get_var(i);
num_dims = var_id->num_dims();
included = 1;
name = var_id->name();
for(j = 0; j < excluded_vars.size(); j++){
if(excluded_vars.at(j) == name){
included = 0;
}
}
if(included){
has_nedges = 0;
for(j = 0; j < num_dims; j++){
dim_name = (var_id->get_dim(j))->name();
if(nedge_tok == dim_name){
has_nedges = 1;
}
}
if(has_nedges){
var_names.push_back(var_id->name());
var_ids.push_back(i);
}
}
}
if(var_names.empty()){
cout << endl;
cout << "No variables indexed by nEdges to color with." << endl;
}
while(!valid && !var_names.empty()){
cout << endl;
cout << "Available variables indexed by nEdges." << endl;
for(i = 0; i < var_names.size(); i++){
cout << var_ids.at(i) << "\t" << var_names.at(i) << ":\t";
num_dims = ncid.get_var(var_ids.at(i))->num_dims();
for(j = 0; j < num_dims-1; j++){
cout << ncid.get_var(var_ids.at(i))->get_dim(j)->name() << "*";
}
cout << ncid.get_var(var_ids.at(i))->get_dim(num_dims-1)->name() << endl;
}
cout << endl << endl;
cout << "Enter the number of the field you would like to print" << endl;
cout << "Choose from list above, or enter 0 for default:" << endl;
cin >> choice;
for(i = 0; i < var_ids.size(); i++){
if(var_ids.at(i) == choice){
valid = 1;
}
}
if(choice == 0){
valid = 1;
}
}
return choice;
}/*}}}*/
//****************************************************************************80
int netcdf_mpas_field_num_dims(string filename, int id){/*{{{*/
//****************************************************************************80
//
// Purpose:
//
// NETCDF_MPAS_FIELD_NUM_DIMS gets the number of dimensions for a field
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 January 2011
//
// Author:
//
// John Burkardt, Doug Jacobsen
//
// Reference:
//
// Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
// The NETCDF User's Guide,
// Unidata Program Center, March 2009.
//
// Parameters:
//
// Input, string NC_FILENAME, the name of the NETCDF file to examine.
//
// Input, int id, the variable id
//
// Output, double dims, the number of dimensions for the field
//
NcVar *var_id;
int num_dims;
//
// Open the file.
//
NcFile ncid ( filename.c_str ( ), NcFile::ReadOnly );
//
// Get the variable values.
//
var_id = ncid.get_var (id);
if(!var_id->is_valid()){
cout << "Field " << id << " doesn't exist." << endl;
cout << "Exiting." << endl;