PISM, A Parallel Ice Sheet Model  stable v2.0.4 committed by Constantine Khrulev on 2022-05-25 12:02:27 -0800
Classes | Public Member Functions | Static Public Member Functions | Private Member Functions | Private Attributes | List of all members
pism::IceModelVec2T Class Reference

A class for storing and accessing 2D time-series (for climate forcing) More...

#include <iceModelVec2T.hh>

+ Inheritance diagram for pism::IceModelVec2T:


struct  Data

Public Member Functions

 IceModelVec2T (IceGrid::ConstPtr grid, const std::string &short_name, unsigned int buffer_size, InterpolationType interpolation_type=PIECEWISE_CONSTANT)
virtual ~IceModelVec2T ()
unsigned int buffer_size ()
void init (const std::string &filename, bool periodic)
void update (double t, double dt)
 Read some data to make sure that the interval (t, t + dt) is covered. More...
MaxTimestep max_timestep (double t) const
 Given the time t determines the maximum possible time-step this IceModelVec2T allows. More...
void interp (double t)
void interp (int i, int j, std::vector< double > &results)
 Compute values of the time-series using precomputed indices (and piece-wise constant or piece-wise linear interpolation). More...
void average (double t, double dt)
void begin_access () const
 Checks if an IceModelVec is allocated and calls DAVecGetArray. More...
void end_access () const
 Checks if an IceModelVec is allocated and calls DAVecRestoreArray. More...
void init_interpolation (const std::vector< double > &ts)
 Compute weights for the piecewise-constant interpolation. This is used both for time-series and "snapshots". More...
- Public Member Functions inherited from pism::IceModelVec2S
 IceModelVec2S (IceGrid::ConstPtr grid, const std::string &name, IceModelVecKind ghostedp, int width=1)
void copy_from (const IceModelVec2S &source)
double ** array ()
double const *const * array () const
void add (double alpha, const IceModelVec2S &x)
void add (double alpha, const IceModelVec2S &x, IceModelVec2S &result) const
double & operator() (int i, int j)
 Provides access (both read and write) to the internal double array. More...
const double & operator() (int i, int j) const
stencils::Star< double > star (int i, int j) const
stencils::Box< double > box (int i, int j) const
- Public Member Functions inherited from pism::IceModelVec
virtual ~IceModelVec ()
IceGrid::ConstPtr grid () const
unsigned int ndims () const
 Returns the number of spatial dimensions. More...
std::vector< int > shape () const
unsigned int ndof () const
 Returns the number of degrees of freedom per grid point. More...
unsigned int stencil_width () const
 Get the stencil width of the current IceModelVec. Returns 0 if ghosts are not available. More...
std::vector< double > levels () const
std::array< double, 2 > range () const
 Result: min <- min(v[j]), max <- max(v[j]). More...
std::vector< double > norm (int n) const
 Computes the norm of all the components of an IceModelVec. More...
void add (double alpha, const IceModelVec &x)
 Result: v <- v + alpha * x. Calls VecAXPY. More...
void shift (double alpha)
 Result: v[j] <- v[j] + alpha for all j. Calls VecShift. More...
void scale (double alpha)
 Result: v <- v * alpha. Calls VecScale. More...
petsc::Vecvec () const
std::shared_ptr< petsc::DMdm () const
void set_name (const std::string &name)
 Sets the variable name to name. More...
const std::string & get_name () const
 Get the name of an IceModelVec object. More...
void set_attrs (const std::string &pism_intent, const std::string &long_name, const std::string &units, const std::string &glaciological_units, const std::string &standard_name, unsigned int component)
 Sets NetCDF attributes of an IceModelVec object. More...
void define (const File &file, IO_Type default_type=PISM_DOUBLE) const
 Define variables corresponding to an IceModelVec in a file opened using file. More...
void read (const std::string &filename, unsigned int time)
void read (const File &file, unsigned int time)
void write (const std::string &filename) const
void write (const File &file) const
void regrid (const std::string &filename, RegriddingFlag flag, double default_value=0.0)
void regrid (const File &file, RegriddingFlag flag, double default_value=0.0)
void update_ghosts ()
 Updates ghost points. More...
std::shared_ptr< petsc::Vecallocate_proc0_copy () const
void put_on_proc0 (petsc::Vec &onp0) const
 Puts a local IceModelVec2S on processor 0. More...
void get_from_proc0 (petsc::Vec &onp0)
 Gets a local IceModelVec2 from processor 0. More...
void set (double c)
 Result: v[j] <- c for all j. More...
SpatialVariableMetadatametadata (unsigned int N=0)
 Returns a reference to the SpatialVariableMetadata object containing metadata for the compoment N. More...
const SpatialVariableMetadatametadata (unsigned int N=0) const
int state_counter () const
 Get the object state counter. More...
void inc_state_counter ()
 Increment the object state counter. More...
void set_time_independent (bool flag)
 Set the time independent flag for all variables corresponding to this IceModelVec instance. More...
void view (std::vector< std::shared_ptr< petsc::Viewer > > viewers) const
 View a 2D vector field using existing PETSc viewers. More...
void dump (const char filename[]) const
 Dumps a variable to a file, overwriting this file's contents (for debugging). More...
uint64_t fletcher64_serial () const
uint64_t fletcher64 () const
std::string checksum (bool serial) const
void print_checksum (const char *prefix="", bool serial=false) const
- Public Member Functions inherited from pism::PetscAccessible
virtual ~PetscAccessible ()=default

Static Public Member Functions

static std::shared_ptr< IceModelVec2TForcingField (IceGrid::ConstPtr grid, const File &file, const std::string &short_name, const std::string &standard_name, int max_buffer_size, bool periodic, InterpolationType interpolation_type=PIECEWISE_CONSTANT)
static std::shared_ptr< IceModelVec2TConstant (IceGrid::ConstPtr grid, const std::string &short_name, double value)
- Static Public Member Functions inherited from pism::IceModelVec
template<class T >
static T::Ptr cast (IceModelVec::Ptr input)
 dynamic_pointer_cast wrapper that checks if the cast succeeded. More...

Private Member Functions

double *** array3 ()
void update (unsigned int start)
 Update by reading at most buffer_size records from the file. More...
void discard (int N)
 Discard the first N records, shifting the rest of them towards the "beginning". More...
void set_record (int n)
 Sets the record number n to the contents of the (internal) Vec v. More...
void init_periodic_data (const File &file)

Private Attributes


Additional Inherited Members

- Public Types inherited from pism::IceModelVec2S
typedef std::shared_ptr< IceModelVec2SPtr
typedef std::shared_ptr< const IceModelVec2SConstPtr
- Public Types inherited from pism::IceModelVec
typedef std::shared_ptr< IceModelVecPtr
typedef std::shared_ptr< const IceModelVecConstPtr
typedef pism::AccessList AccessList
- Protected Member Functions inherited from pism::IceModelVec
 IceModelVec (IceGrid::ConstPtr grid, const std::string &name, IceModelVecKind ghostedp, size_t dof, size_t stencil_width, const std::vector< double > &zlevels)
void set_begin_access_use_dof (bool flag)
void read_impl (const File &file, unsigned int time)
 Reads appropriate NetCDF variable(s) into an IceModelVec. More...
void regrid_impl (const File &file, RegriddingFlag flag, double default_value=0.0)
 Gets an IceModelVec from a file file, interpolating onto the current grid. More...
void write_impl (const File &file) const
 Writes an IceModelVec to a NetCDF file. More...
void checkCompatibility (const char *function, const IceModelVec &other) const
 Checks if two IceModelVecs have compatible sizes, dimensions and numbers of degrees of freedom. More...
void check_array_indices (int i, int j, unsigned int k) const
 Check array indices and warn if they are out of range. More...
void copy_to_vec (std::shared_ptr< petsc::DM > destination_da, petsc::Vec &destination) const
 Copies v to a global vector 'destination'. Ghost points are discarded. More...
void get_dof (std::shared_ptr< petsc::DM > da_result, petsc::Vec &result, unsigned int start, unsigned int count=1) const
void set_dof (std::shared_ptr< petsc::DM > da_source, petsc::Vec &source, unsigned int start, unsigned int count=1)
void put_on_proc0 (petsc::Vec &parallel, petsc::Vec &onp0) const
void get_from_proc0 (petsc::Vec &onp0, petsc::Vec &parallel) const
- Protected Attributes inherited from pism::IceModelVec
void * m_array

Detailed Description

A class for storing and accessing 2D time-series (for climate forcing)

This class was created to read time-dependent and spatially-varying climate forcing data, in particular snow temperatures and precipitation.

If requests (calls to update()) go in sequence, every records should be read only once.

Note that this class is optimized for use with a PDD scheme – it stores records so that data corresponding to a grid point are stored in adjacent memory locations.

IceModelVec2T is always global (i.e. has no ghosts).

Both versions of interp() use piecewise-constant interpolation and extrapolate (by a constant) outside the available range.

Definition at line 44 of file iceModelVec2T.hh.

The documentation for this class was generated from the following files: