SPARSE_GRID_CC_DATASET
Create Clenshaw-Curtis Sparse Grid Dataset
SPARSE_GRID_CC_DATASET
is a C program which
creates a Clenshaw-Curtis sparse grid dataset.
Usage:
sparse_grid_cc_dataset dim_num level_max
where
-
dim_num is the spatial dimension, typically between 2 and 10;
-
level_max is the sparse grid level, typically between 0 and 6,
which controls the number of points
in the grid. The 1D rules used will have order 2^(level_max)+1.
Each sparse grid is stored using the "quadrature rule" format,
that is, as three files:
-
an "R" or "region" file, which lists two points that bound the region;
-
a "W" or "weight" file, which lists the weight for each abscissa;
-
an "X" or "abscissa" file, which lists the abscissas of the rule.
The abscissas are ordered to respect the natural nesting of the
sparse grids by level. That is, the file of level 3 points begins by
listing the points in the level 2 grid.
Licensing:
The code described and made available on this web page is distributed
under the
GNU LGPL license.
Languages:
SPARSE_GRID_CC_DATASET is available in
a C version and
a C++ version and
a FORTRAN90 version and
a MATLAB version.
Related Data and Programs:
MONTE_CARLO_RULE,
a FORTRAN90 program which
generates a dataset of N random M-dimensional points,
regards it as a quadrature rule for the unit hypercube,
and writes out three files of information.
SGMGA,
a C library which
creates sparse grids based on a mixture of 1D quadrature rules,
allowing anisotropic weights for each dimension.
SMOLPACK,
a C library which
implements Novak and Ritter's method for estimating the integral
of a function over a multidimensional hypercube using sparse grids.
SPARSE_GRID_CC,
a C library which
creates a Clenshaw-Curtis sparse grid.
SPARSE_GRID_CC,
a dataset directory which
contains examples of Clenshaw-Curtis sparse grids.
SPARSE_GRID_HW,
a C library which
creates sparse grids based on Gauss-Legendre, Gauss-Hermite,
Gauss-Patterson, or a nested variation of Gauss-Hermite rules,
by Florian Heiss and Viktor Winschel.
TOMS847,
a MATLAB program which
uses sparse grids to carry out multilinear hierarchical interpolation.
It is commonly known as SPINTERP, and is by Andreas Klimke.
Reference:
-
Volker Barthelmann, Erich Novak, Klaus Ritter,
High Dimensional Polynomial Interpolation on Sparse Grids,
Advances in Computational Mathematics,
Volume 12, Number 4, 2000, pages 273-288.
-
Thomas Gerstner, Michael Griebel,
Numerical Integration Using Sparse Grids,
Numerical Algorithms,
Volume 18, Number 3-4, 1998, pages 209-232.
-
Albert Nijenhuis, Herbert Wilf,
Combinatorial Algorithms for Computers and Calculators,
Second Edition,
Academic Press, 1978,
ISBN: 0-12-519260-6,
LC: QA164.N54.
-
Fabio Nobile, Raul Tempone, Clayton Webster,
A Sparse Grid Stochastic Collocation Method for Partial Differential
Equations with Random Input Data,
SIAM Journal on Numerical Analysis,
Volume 46, Number 5, 2008, pages 2309-2345.
-
Sergey Smolyak,
Quadrature and Interpolation Formulas for Tensor Products of
Certain Classes of Functions,
Doklady Akademii Nauk SSSR,
Volume 4, 1963, pages 240-243.
-
Dennis Stanton, Dennis White,
Constructive Combinatorics,
Springer, 1986,
ISBN: 0387963472,
LC: QA164.S79.
Source Code:
Examples and Tests:
Here are the three quadrature files created by the command
sparse_grid_cc_dataset 2 3
List of Routines:
-
MAIN is the main program for SPARSE_GRID_CC_DATASET.
-
ABSCISSA_LEVEL_CLOSED_ND: first level at which an abscissa is generated.
-
CC_ABSCISSA returns the I-th abscissa of the Clenshaw Curtis rule.
-
CC_WEIGHTS computes Clenshaw Curtis weights.
-
COMP_NEXT computes the compositions of the integer N into K parts.
-
I4_CHOOSE computes the binomial coefficient C(N,K).
-
I4_MAX returns the maximum of two I4's.
-
I4_MIN returns the smaller of two I4's.
-
I4_MODP returns the nonnegative remainder of I4 division.
-
I4_MOP returns the I-th power of -1 as an I4 value.
-
I4_POWER returns the value of I^J.
-
I4VEC_PRODUCT multiplies the entries of an I4VEC.
-
INDEX_TO_LEVEL_CLOSED determines the level of a point given its index.
-
LEVEL_TO_ORDER_CLOSED converts a level to an order for closed rules.
-
MONOMIAL_INT01 returns the integral of a monomial over the [0,1] hypercube.
-
MULTIGRID_INDEX0 returns an indexed multidimensional grid.
-
MULTIGRID_SCALE_CLOSED renumbers a grid as a subgrid on a higher level.
-
PRODUCT_WEIGHTS_CC computes weights for a Clenshaw Curtis product rule.
-
R8_EPSILON returns the R8 round off unit.
-
R8MAT_TRANSPOSE_PRINT_SOME prints some of an R8MAT, transposed.
-
R8MAT_WRITE writes an R8MAT file.
-
R8VEC_DIRECT_PRODUCT2 creates a direct product of R8VEC's.
-
R8VEC_PRINT_SOME prints "some" of an R8VEC.
-
SPARSE_GRID_CC computes a sparse grid of Clenshaw Curtis points.
-
SPARSE_GRID_CC_INDEX indexes the points forming a sparse grid.
-
SPARSE_GRID_CC_SIZE_OLD sizes a sparse grid of Clenshaw Curtis points.
-
SPARSE_GRID_CC_WEIGHTS gathers the weights.
-
SPARSE_GRID_CCS_SIZE sizes a sparse grid using Clenshaw Curtis Slow rules.
-
SPARSE_GRID_CFN_SIZE sizes a sparse grid using Closed Fully Nested rules.
-
TIMESTAMP prints the current YMDHMS date as a time stamp.
-
VEC_COLEX_NEXT2 generates vectors in colex order.
You can go up one level to
the C source codes.
Last revised on 16 March 2013.