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// N-D Array manipulations.
/*
Copyright (C) 1996-2013 John W. Eaton
Copyright (C) 2009 VZLU Prague, a.s.
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cfloat>
#include <vector>
#include "Array-util.h"
#include "dNDArray.h"
#include "f77-fcn.h"
#include "functor.h"
#include "lo-error.h"
#include "lo-ieee.h"
#include "lo-mappers.h"
#include "mx-base.h"
#include "mx-op-defs.h"
#include "oct-fftw.h"
#include "oct-locbuf.h"
#include "bsxfun-defs.cc"
NDArray::NDArray (const Array<octave_idx_type>& a, bool zero_based,
bool negative_to_nan)
{
const octave_idx_type *pa = a.fortran_vec ();
resize (a.dims ());
double *ptmp = fortran_vec ();
if (negative_to_nan)
{
double nan_val = lo_ieee_nan_value ();
if (zero_based)
for (octave_idx_type i = 0; i < a.numel (); i++)
{
double val = static_cast<double>
(pa[i] + static_cast<octave_idx_type> (1));
if (val <= 0)
ptmp[i] = nan_val;
else
ptmp[i] = val;
}
else
for (octave_idx_type i = 0; i < a.numel (); i++)
{
double val = static_cast<double> (pa[i]);
if (val <= 0)
ptmp[i] = nan_val;
else
ptmp[i] = val;
}
}
else
{
if (zero_based)
for (octave_idx_type i = 0; i < a.numel (); i++)
ptmp[i] = static_cast<double>
(pa[i] + static_cast<octave_idx_type> (1));
else
for (octave_idx_type i = 0; i < a.numel (); i++)
ptmp[i] = static_cast<double> (pa[i]);
}
}
NDArray::NDArray (const charNDArray& a)
: MArray<double> (a.dims ())
{
octave_idx_type n = a.numel ();
for (octave_idx_type i = 0; i < n; i++)
xelem (i) = static_cast<unsigned char> (a(i));
}
#if defined (HAVE_FFTW)
ComplexNDArray
NDArray::fourier (int dim) const
{
dim_vector dv = dims ();
if (dim > dv.length () || dim < 0)
return ComplexNDArray ();
octave_idx_type stride = 1;
octave_idx_type n = dv(dim);
for (int i = 0; i < dim; i++)
stride *= dv(i);
octave_idx_type howmany = numel () / dv (dim);
howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / dv (dim) / stride);
octave_idx_type dist = (stride == 1 ? n : 1);
const double *in (fortran_vec ());
ComplexNDArray retval (dv);
Complex *out (retval.fortran_vec ());
// Need to be careful here about the distance between fft's
for (octave_idx_type k = 0; k < nloop; k++)
octave_fftw::fft (in + k * stride * n, out + k * stride * n,
n, howmany, stride, dist);
return retval;
}
ComplexNDArray
NDArray::ifourier (int dim) const
{
dim_vector dv = dims ();
if (dim > dv.length () || dim < 0)
return ComplexNDArray ();
octave_idx_type stride = 1;
octave_idx_type n = dv(dim);
for (int i = 0; i < dim; i++)
stride *= dv(i);
octave_idx_type howmany = numel () / dv (dim);
howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / dv (dim) / stride);
octave_idx_type dist = (stride == 1 ? n : 1);
ComplexNDArray retval (*this);
Complex *out (retval.fortran_vec ());
// Need to be careful here about the distance between fft's
for (octave_idx_type k = 0; k < nloop; k++)
octave_fftw::ifft (out + k * stride * n, out + k * stride * n,
n, howmany, stride, dist);
return retval;
}
ComplexNDArray
NDArray::fourier2d (void) const
{
dim_vector dv = dims ();
if (dv.length () < 2)
return ComplexNDArray ();
dim_vector dv2(dv(0), dv(1));
const double *in = fortran_vec ();
ComplexNDArray retval (dv);
Complex *out = retval.fortran_vec ();
octave_idx_type howmany = numel () / dv(0) / dv(1);
octave_idx_type dist = dv(0) * dv(1);
for (octave_idx_type i=0; i < howmany; i++)
octave_fftw::fftNd (in + i*dist, out + i*dist, 2, dv2);
return retval;
}
ComplexNDArray
NDArray::ifourier2d (void) const
{
dim_vector dv = dims ();
if (dv.length () < 2)
return ComplexNDArray ();
dim_vector dv2(dv(0), dv(1));
ComplexNDArray retval (*this);
Complex *out = retval.fortran_vec ();
octave_idx_type howmany = numel () / dv(0) / dv(1);
octave_idx_type dist = dv(0) * dv(1);
for (octave_idx_type i=0; i < howmany; i++)
octave_fftw::ifftNd (out + i*dist, out + i*dist, 2, dv2);
return retval;
}
ComplexNDArray
NDArray::fourierNd (void) const
{
dim_vector dv = dims ();
int rank = dv.length ();
const double *in (fortran_vec ());
ComplexNDArray retval (dv);
Complex *out (retval.fortran_vec ());
octave_fftw::fftNd (in, out, rank, dv);
return retval;
}
ComplexNDArray
NDArray::ifourierNd (void) const
{
dim_vector dv = dims ();
int rank = dv.length ();
ComplexNDArray tmp (*this);
Complex *in (tmp.fortran_vec ());
ComplexNDArray retval (dv);
Complex *out (retval.fortran_vec ());
octave_fftw::ifftNd (in, out, rank, dv);
return retval;
}
#else
extern "C"
{
// Note that the original complex fft routines were not written for
// double complex arguments. They have been modified by adding an
// implicit double precision (a-h,o-z) statement at the beginning of
// each subroutine.
F77_RET_T
F77_FUNC (zffti, ZFFTI) (const octave_idx_type&, Complex*);
F77_RET_T
F77_FUNC (zfftf, ZFFTF) (const octave_idx_type&, Complex*, Complex*);
F77_RET_T
F77_FUNC (zfftb, ZFFTB) (const octave_idx_type&, Complex*, Complex*);
}
ComplexNDArray
NDArray::fourier (int dim) const
{
dim_vector dv = dims ();
if (dim > dv.length () || dim < 0)
return ComplexNDArray ();
ComplexNDArray retval (dv);
octave_idx_type npts = dv(dim);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
OCTAVE_LOCAL_BUFFER (Complex, tmp, npts);
octave_idx_type stride = 1;
for (int i = 0; i < dim; i++)
stride *= dv(i);
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type i = 0; i < npts; i++)
tmp[i] = elem ((i + k*npts)*stride + j*dist);
F77_FUNC (zfftf, ZFFTF) (npts, tmp, pwsave);
for (octave_idx_type i = 0; i < npts; i++)
retval((i + k*npts)*stride + j*dist) = tmp[i];
}
}
return retval;
}
ComplexNDArray
NDArray::ifourier (int dim) const
{
dim_vector dv = dims ();
if (dim > dv.length () || dim < 0)
return ComplexNDArray ();
ComplexNDArray retval (dv);
octave_idx_type npts = dv(dim);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
OCTAVE_LOCAL_BUFFER (Complex, tmp, npts);
octave_idx_type stride = 1;
for (int i = 0; i < dim; i++)
stride *= dv(i);
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type i = 0; i < npts; i++)
tmp[i] = elem ((i + k*npts)*stride + j*dist);
F77_FUNC (zfftb, ZFFTB) (npts, tmp, pwsave);
for (octave_idx_type i = 0; i < npts; i++)
retval((i + k*npts)*stride + j*dist) = tmp[i] /
static_cast<double> (npts);
}
}
return retval;
}
ComplexNDArray
NDArray::fourier2d (void) const
{
dim_vector dv = dims ();
dim_vector dv2 (dv(0), dv(1));
int rank = 2;
ComplexNDArray retval (*this);
octave_idx_type stride = 1;
for (int i = 0; i < rank; i++)
{
octave_idx_type npts = dv2(i);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
Array<Complex> row (npts);
Complex *prow = row.fortran_vec ();
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany :
(howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type l = 0; l < npts; l++)
prow[l] = retval((l + k*npts)*stride + j*dist);
F77_FUNC (zfftf, ZFFTF) (npts, prow, pwsave);
for (octave_idx_type l = 0; l < npts; l++)
retval((l + k*npts)*stride + j*dist) = prow[l];
}
}
stride *= dv2(i);
}
return retval;
}
ComplexNDArray
NDArray::ifourier2d (void) const
{
dim_vector dv = dims ();
dim_vector dv2 (dv(0), dv(1));
int rank = 2;
ComplexNDArray retval (*this);
octave_idx_type stride = 1;
for (int i = 0; i < rank; i++)
{
octave_idx_type npts = dv2(i);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
Array<Complex> row (npts);
Complex *prow = row.fortran_vec ();
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany :
(howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type l = 0; l < npts; l++)
prow[l] = retval((l + k*npts)*stride + j*dist);
F77_FUNC (zfftb, ZFFTB) (npts, prow, pwsave);
for (octave_idx_type l = 0; l < npts; l++)
retval((l + k*npts)*stride + j*dist) =
prow[l] / static_cast<double> (npts);
}
}
stride *= dv2(i);
}
return retval;
}
ComplexNDArray
NDArray::fourierNd (void) const
{
dim_vector dv = dims ();
int rank = dv.length ();
ComplexNDArray retval (*this);
octave_idx_type stride = 1;
for (int i = 0; i < rank; i++)
{
octave_idx_type npts = dv(i);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
Array<Complex> row (npts);
Complex *prow = row.fortran_vec ();
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany :
(howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type l = 0; l < npts; l++)
prow[l] = retval((l + k*npts)*stride + j*dist);
F77_FUNC (zfftf, ZFFTF) (npts, prow, pwsave);
for (octave_idx_type l = 0; l < npts; l++)
retval((l + k*npts)*stride + j*dist) = prow[l];
}
}
stride *= dv(i);
}
return retval;
}
ComplexNDArray
NDArray::ifourierNd (void) const
{
dim_vector dv = dims ();
int rank = dv.length ();
ComplexNDArray retval (*this);
octave_idx_type stride = 1;
for (int i = 0; i < rank; i++)
{
octave_idx_type npts = dv(i);
octave_idx_type nn = 4*npts+15;
Array<Complex> wsave (nn);
Complex *pwsave = wsave.fortran_vec ();
Array<Complex> row (npts);
Complex *prow = row.fortran_vec ();
octave_idx_type howmany = numel () / npts;
howmany = (stride == 1 ? howmany :
(howmany > stride ? stride : howmany));
octave_idx_type nloop = (stride == 1 ? 1 : numel () / npts / stride);
octave_idx_type dist = (stride == 1 ? npts : 1);
F77_FUNC (zffti, ZFFTI) (npts, pwsave);
for (octave_idx_type k = 0; k < nloop; k++)
{
for (octave_idx_type j = 0; j < howmany; j++)
{
octave_quit ();
for (octave_idx_type l = 0; l < npts; l++)
prow[l] = retval((l + k*npts)*stride + j*dist);
F77_FUNC (zfftb, ZFFTB) (npts, prow, pwsave);
for (octave_idx_type l = 0; l < npts; l++)
retval((l + k*npts)*stride + j*dist) =
prow[l] / static_cast<double> (npts);
}
}
stride *= dv(i);
}
return retval;
}
#endif
// unary operations
boolNDArray
NDArray::operator ! (void) const
{
if (any_element_is_nan ())
gripe_nan_to_logical_conversion ();
return do_mx_unary_op<bool, double> (*this, mx_inline_not);
}
bool
NDArray::any_element_is_negative (bool neg_zero) const
{
return (neg_zero ? test_all (xnegative_sign)
: do_mx_check<double> (*this, mx_inline_any_negative));
}
bool
NDArray::any_element_is_positive (bool neg_zero) const
{
return (neg_zero ? test_all (xpositive_sign)
: do_mx_check<double> (*this, mx_inline_any_positive));
}
bool
NDArray::any_element_is_nan (void) const
{
return do_mx_check<double> (*this, mx_inline_any_nan);
}
bool
NDArray::any_element_is_inf_or_nan (void) const
{
return ! do_mx_check<double> (*this, mx_inline_all_finite);
}
bool
NDArray::any_element_not_one_or_zero (void) const
{
return ! test_all (xis_one_or_zero);
}
bool
NDArray::all_elements_are_zero (void) const
{
return test_all (xis_zero);
}
bool
NDArray::all_elements_are_int_or_inf_or_nan (void) const
{
return test_all (xis_int_or_inf_or_nan);
}
// Return nonzero if any element of M is not an integer. Also extract
// the largest and smallest values and return them in MAX_VAL and MIN_VAL.
bool
NDArray::all_integers (double& max_val, double& min_val) const
{
octave_idx_type nel = nelem ();
if (nel > 0)
{
max_val = elem (0);
min_val = elem (0);
}
else
return false;
for (octave_idx_type i = 0; i < nel; i++)
{
double val = elem (i);
if (val > max_val)
max_val = val;
if (val < min_val)
min_val = val;
if (! xisinteger (val))
return false;
}
return true;
}
bool
NDArray::all_integers (void) const
{
return test_all (xisinteger);
}
bool
NDArray::too_large_for_float (void) const
{
return test_any (xtoo_large_for_float);
}
// FIXME: this is not quite the right thing.
boolNDArray
NDArray::all (int dim) const
{
return do_mx_red_op<bool, double> (*this, dim, mx_inline_all);
}
boolNDArray
NDArray::any (int dim) const
{
return do_mx_red_op<bool, double> (*this, dim, mx_inline_any);
}
NDArray
NDArray::cumprod (int dim) const
{
return do_mx_cum_op<double, double> (*this, dim, mx_inline_cumprod);
}
NDArray
NDArray::cumsum (int dim) const
{
return do_mx_cum_op<double, double> (*this, dim, mx_inline_cumsum);
}
NDArray
NDArray::prod (int dim) const
{
return do_mx_red_op<double, double> (*this, dim, mx_inline_prod);
}
NDArray
NDArray::sum (int dim) const
{
return do_mx_red_op<double, double> (*this, dim, mx_inline_sum);
}
NDArray
NDArray::xsum (int dim) const
{
return do_mx_red_op<double, double> (*this, dim, mx_inline_xsum);
}
NDArray
NDArray::sumsq (int dim) const
{
return do_mx_red_op<double, double> (*this, dim, mx_inline_sumsq);
}
NDArray
NDArray::max (int dim) const
{
return do_mx_minmax_op<double> (*this, dim, mx_inline_max);
}
NDArray
NDArray::max (Array<octave_idx_type>& idx_arg, int dim) const
{
return do_mx_minmax_op<double> (*this, idx_arg, dim, mx_inline_max);
}
NDArray
NDArray::min (int dim) const
{
return do_mx_minmax_op<double> (*this, dim, mx_inline_min);
}
NDArray
NDArray::min (Array<octave_idx_type>& idx_arg, int dim) const
{
return do_mx_minmax_op<double> (*this, idx_arg, dim, mx_inline_min);
}
NDArray
NDArray::cummax (int dim) const
{
return do_mx_cumminmax_op<double> (*this, dim, mx_inline_cummax);
}
NDArray
NDArray::cummax (Array<octave_idx_type>& idx_arg, int dim) const
{
return do_mx_cumminmax_op<double> (*this, idx_arg, dim, mx_inline_cummax);
}
NDArray
NDArray::cummin (int dim) const
{
return do_mx_cumminmax_op<double> (*this, dim, mx_inline_cummin);
}
NDArray
NDArray::cummin (Array<octave_idx_type>& idx_arg, int dim) const
{
return do_mx_cumminmax_op<double> (*this, idx_arg, dim, mx_inline_cummin);
}
NDArray
NDArray::diff (octave_idx_type order, int dim) const
{
return do_mx_diff_op<double> (*this, dim, order, mx_inline_diff);
}
NDArray
NDArray::concat (const NDArray& rb, const Array<octave_idx_type>& ra_idx)
{
if (rb.numel () > 0)
insert (rb, ra_idx);
return *this;
}
ComplexNDArray
NDArray::concat (const ComplexNDArray& rb, const Array<octave_idx_type>& ra_idx)
{
ComplexNDArray retval (*this);
if (rb.numel () > 0)
retval.insert (rb, ra_idx);
return retval;
}
charNDArray
NDArray::concat (const charNDArray& rb, const Array<octave_idx_type>& ra_idx)
{
charNDArray retval (dims ());
octave_idx_type nel = numel ();
for (octave_idx_type i = 0; i < nel; i++)
{
double d = elem (i);
if (xisnan (d))
{
(*current_liboctave_error_handler)
("invalid conversion from NaN to character");
return retval;
}
else
{
octave_idx_type ival = NINTbig (d);
if (ival < 0 || ival > std::numeric_limits<unsigned char>::max ())
// FIXME: is there something better to do? Should we warn the user?
ival = 0;
retval.elem (i) = static_cast<char>(ival);
}
}
if (rb.numel () == 0)
return retval;
retval.insert (rb, ra_idx);
return retval;
}
NDArray
real (const ComplexNDArray& a)
{
return do_mx_unary_op<double, Complex> (a, mx_inline_real);
}
NDArray
imag (const ComplexNDArray& a)
{
return do_mx_unary_op<double, Complex> (a, mx_inline_imag);
}
NDArray&
NDArray::insert (const NDArray& a, octave_idx_type r, octave_idx_type c)
{
Array<double>::insert (a, r, c);
return *this;
}
NDArray&
NDArray::insert (const NDArray& a, const Array<octave_idx_type>& ra_idx)
{
Array<double>::insert (a, ra_idx);
return *this;
}
NDArray
NDArray::abs (void) const
{
return do_mx_unary_map<double, double, std::abs> (*this);
}
boolNDArray
NDArray::isnan (void) const
{
return do_mx_unary_map<bool, double, xisnan> (*this);
}
boolNDArray
NDArray::isinf (void) const
{
return do_mx_unary_map<bool, double, xisinf> (*this);
}
boolNDArray
NDArray::isfinite (void) const
{
return do_mx_unary_map<bool, double, xfinite> (*this);
}
Matrix
NDArray::matrix_value (void) const
{
Matrix retval;
if (ndims () == 2)
retval = Matrix (Array<double> (*this));
else
(*current_liboctave_error_handler)
("invalid conversion of NDArray to Matrix");
return retval;
}
void
NDArray::increment_index (Array<octave_idx_type>& ra_idx,
const dim_vector& dimensions,
int start_dimension)
{
::increment_index (ra_idx, dimensions, start_dimension);
}
octave_idx_type
NDArray::compute_index (Array<octave_idx_type>& ra_idx,
const dim_vector& dimensions)
{
return ::compute_index (ra_idx, dimensions);
}
NDArray
NDArray::diag (octave_idx_type k) const
{
return MArray<double>::diag (k);
}
NDArray
NDArray::diag (octave_idx_type m, octave_idx_type n) const
{
return MArray<double>::diag (m, n);
}
// This contains no information on the array structure !!!
std::ostream&
operator << (std::ostream& os, const NDArray& a)
{
octave_idx_type nel = a.nelem ();
for (octave_idx_type i = 0; i < nel; i++)
{
os << " ";
octave_write_double (os, a.elem (i));
os << "\n";
}
return os;
}
std::istream&
operator >> (std::istream& is, NDArray& a)
{
octave_idx_type nel = a.nelem ();
if (nel > 0)
{
double tmp;
for (octave_idx_type i = 0; i < nel; i++)
{
tmp = octave_read_value<double> (is);
if (is)
a.elem (i) = tmp;
else
goto done;
}
}
done:
return is;
}
MINMAX_FCNS (NDArray, double)
NDS_CMP_OPS (NDArray, double)
NDS_BOOL_OPS (NDArray, double)
SND_CMP_OPS (double, NDArray)
SND_BOOL_OPS (double, NDArray)
NDND_CMP_OPS (NDArray, NDArray)
NDND_BOOL_OPS (NDArray, NDArray)
BSXFUN_STDOP_DEFS_MXLOOP (NDArray)
BSXFUN_STDREL_DEFS_MXLOOP (NDArray)
BSXFUN_OP_DEF_MXLOOP (pow, NDArray, mx_inline_pow)
BSXFUN_OP2_DEF_MXLOOP (pow, ComplexNDArray, ComplexNDArray,
NDArray, mx_inline_pow)
BSXFUN_OP2_DEF_MXLOOP (pow, ComplexNDArray, NDArray,
ComplexNDArray, mx_inline_pow)
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