inline
void
op_sp_plus::apply_inside_schur(SpMat<eT>& out, const T2& x, const SpToDOp<T3, op_sp_plus>& y)
{
arma_extra_debug_sigprint();
const SpProxy<T2> proxy2(x);
const SpProxy<T3> proxy3(y.m);
arma_debug_assert_same_size(proxy2.get_n_rows(), proxy2.get_n_cols(), proxy3.get_n_rows(), proxy3.get_n_cols(), "element-wise multiplication");
out.zeros(proxy2.get_n_rows(), proxy2.get_n_cols());
typename SpProxy<T2>::const_iterator_type it = proxy2.begin();
typename SpProxy<T2>::const_iterator_type it_end = proxy2.end();
const eT k = y.aux;
for(; it != it_end; ++it)
{
const uword it_row = it.row();
const uword it_col = it.col();
out.at(it_row, it_col) = (*it) * (proxy3.at(it_row, it_col) + k);
}
}
inline
void
op_sp_plus::apply(SpMat<typename T1::elem_type>& out, const SpToDOp<T1,op_sp_plus>& in)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
// Note that T1 will be a sparse type, so we use SpProxy.
const SpProxy<T1> proxy(in.m);
const uword n_rows = proxy.get_n_rows();
const uword n_cols = proxy.get_n_cols();
out.set_size(n_rows, n_cols);
const eT k = in.aux;
// We have to loop over all the elements.
for(uword c = 0; c < n_cols; ++c)
for(uword r = 0; r < n_rows; ++r)
{
out.at(r, c) = proxy.at(r, c) + k;
}
}
inline
void
spop_mean::apply_noalias_slow
(
SpMat<typename T1::elem_type>& out,
const SpProxy<T1>& p,
const uword dim
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword p_n_rows = p.get_n_rows();
const uword p_n_cols = p.get_n_cols();
if(dim == 0) // find the mean in each column
{
arma_extra_debug_print("spop_mean::apply_noalias(): dim = 0");
out.set_size((p_n_rows > 0) ? 1 : 0, p_n_cols);
if( (p_n_rows == 0) || (p.get_n_nonzero() == 0) ) { return; }
for(uword col = 0; col < p_n_cols; ++col)
{
// Do we have to use an iterator or can we use memory directly?
if(SpProxy<T1>::must_use_iterator)
{
typename SpProxy<T1>::const_iterator_type it = p.begin_col(col);
typename SpProxy<T1>::const_iterator_type end = p.begin_col(col + 1);
const uword n_zero = p_n_rows - (end.pos() - it.pos());
out.at(0,col) = spop_mean::iterator_mean(it, end, n_zero, eT(0));
}
else
{
out.at(0,col) = spop_mean::direct_mean
(
&p.get_values()[p.get_col_ptrs()[col]],
p.get_col_ptrs()[col + 1] - p.get_col_ptrs()[col],
p_n_rows
);
}
}
}
else
if(dim == 1) // find the mean in each row
{
arma_extra_debug_print("spop_mean::apply_noalias(): dim = 1");
out.set_size(p_n_rows, (p_n_cols > 0) ? 1 : 0);
if( (p_n_cols == 0) || (p.get_n_nonzero() == 0) ) { return; }
for(uword row = 0; row < p_n_rows; ++row)
{
// We must use an iterator regardless of how it is stored.
typename SpProxy<T1>::const_row_iterator_type it = p.begin_row(row);
typename SpProxy<T1>::const_row_iterator_type end = p.end_row(row);
const uword n_zero = p_n_cols - (end.pos() - it.pos());
out.at(row,0) = spop_mean::iterator_mean(it, end, n_zero, eT(0));
}
}
}
inline
void
spop_diagmat::apply_noalias(SpMat<typename T1::elem_type>& out, const SpProxy<T1>& p)
{
arma_extra_debug_sigprint();
const uword n_rows = p.get_n_rows();
const uword n_cols = p.get_n_cols();
const bool p_is_vec = (n_rows == 1) || (n_cols == 1);
if(p_is_vec) // generate a diagonal matrix out of a vector
{
const uword N = (n_rows == 1) ? n_cols : n_rows;
out.zeros(N, N);
if(p.get_n_nonzero() == 0) { return; }
typename SpProxy<T1>::const_iterator_type it = p.begin();
typename SpProxy<T1>::const_iterator_type it_end = p.end();
if(n_cols == 1)
{
while(it != it_end)
{
const uword row = it.row();
out.at(row,row) = (*it);
++it;
}
}
else
if(n_rows == 1)
{
while(it != it_end)
{
const uword col = it.col();
out.at(col,col) = (*it);
++it;
}
}
}
else // generate a diagonal matrix out of a matrix
{
arma_debug_check( (n_rows != n_cols), "diagmat(): given matrix is not square" );
out.zeros(n_rows, n_rows);
if(p.get_n_nonzero() == 0) { return; }
typename SpProxy<T1>::const_iterator_type it = p.begin();
typename SpProxy<T1>::const_iterator_type it_end = p.end();
while(it != it_end)
{
const uword row = it.row();
const uword col = it.col();
if(row == col)
{
out.at(row,row) = (*it);
}
++it;
}
}
}
inline
void
spop_var::apply_noalias
(
SpMat<typename T1::pod_type>& out_ref,
const SpProxy<T1>& p,
const uword norm_type,
const uword dim
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type in_eT;
//typedef typename T1::pod_type out_eT;
const uword p_n_rows = p.get_n_rows();
const uword p_n_cols = p.get_n_cols();
if(dim == 0)
{
arma_extra_debug_print("spop_var::apply(), dim = 0");
arma_debug_check((p_n_rows == 0), "var(): given object has zero rows");
out_ref.set_size(1, p_n_cols);
for(uword col = 0; col < p_n_cols; ++col)
{
if(SpProxy<T1>::must_use_iterator == true)
{
// We must use an iterator; we can't access memory directly.
typename SpProxy<T1>::const_iterator_type it = p.begin_col(col);
typename SpProxy<T1>::const_iterator_type end = p.begin_col(col + 1);
const uword n_zero = p.get_n_rows() - (end.pos() - it.pos());
// in_eT is used just to get the specialization right (complex / noncomplex)
out_ref.at(col) = spop_var::iterator_var(it, end, n_zero, norm_type, in_eT(0));
}
else
{
// We can use direct memory access to calculate the variance.
out_ref.at(col) = spop_var::direct_var
(
&p.get_values()[p.get_col_ptrs()[col]],
p.get_col_ptrs()[col + 1] - p.get_col_ptrs()[col],
p.get_n_rows(),
norm_type
);
}
}
}
else if(dim == 1)
{
arma_extra_debug_print("spop_var::apply_noalias(), dim = 1");
arma_debug_check((p_n_cols == 0), "var(): given object has zero columns");
out_ref.set_size(p_n_rows, 1);
for(uword row = 0; row < p_n_rows; ++row)
{
// We have to use an iterator here regardless of whether or not we can
// directly access memory.
typename SpProxy<T1>::const_row_iterator_type it = p.begin_row(row);
typename SpProxy<T1>::const_row_iterator_type end = p.end_row(row);
const uword n_zero = p.get_n_cols() - (end.pos() - it.pos());
out_ref.at(row) = spop_var::iterator_var(it, end, n_zero, norm_type, in_eT(0));
}
}
}
inline
void
spop_var::apply_noalias
(
SpMat<typename T1::pod_type>& out,
const SpProxy<T1>& p,
const uword norm_type,
const uword dim
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type in_eT;
//typedef typename T1::pod_type out_eT;
const uword p_n_rows = p.get_n_rows();
const uword p_n_cols = p.get_n_cols();
// TODO: this is slow; rewrite based on the approach used by sparse mean()
if(dim == 0) // find variance in each column
{
arma_extra_debug_print("spop_var::apply_noalias(): dim = 0");
out.set_size((p_n_rows > 0) ? 1 : 0, p_n_cols);
if( (p_n_rows == 0) || (p.get_n_nonzero() == 0) ) { return; }
for(uword col = 0; col < p_n_cols; ++col)
{
if(SpProxy<T1>::must_use_iterator)
{
// We must use an iterator; we can't access memory directly.
typename SpProxy<T1>::const_iterator_type it = p.begin_col(col);
typename SpProxy<T1>::const_iterator_type end = p.begin_col(col + 1);
const uword n_zero = p_n_rows - (end.pos() - it.pos());
// in_eT is used just to get the specialization right (complex / noncomplex)
out.at(0, col) = spop_var::iterator_var(it, end, n_zero, norm_type, in_eT(0));
}
else
{
// We can use direct memory access to calculate the variance.
out.at(0, col) = spop_var::direct_var
(
&p.get_values()[p.get_col_ptrs()[col]],
p.get_col_ptrs()[col + 1] - p.get_col_ptrs()[col],
p_n_rows,
norm_type
);
}
}
}
else
if(dim == 1) // find variance in each row
{
arma_extra_debug_print("spop_var::apply_noalias(): dim = 1");
out.set_size(p_n_rows, (p_n_cols > 0) ? 1 : 0);
if( (p_n_cols == 0) || (p.get_n_nonzero() == 0) ) { return; }
for(uword row = 0; row < p_n_rows; ++row)
{
// We have to use an iterator here regardless of whether or not we can
// directly access memory.
typename SpProxy<T1>::const_row_iterator_type it = p.begin_row(row);
typename SpProxy<T1>::const_row_iterator_type end = p.end_row(row);
const uword n_zero = p_n_cols - (end.pos() - it.pos());
out.at(row, 0) = spop_var::iterator_var(it, end, n_zero, norm_type, in_eT(0));
}
}
}
inline
void
spdiagview<eT>::operator/=(const SpBase<eT,T1>& o)
{
arma_extra_debug_sigprint();
spdiagview<eT>& d = *this;
SpMat<eT>& d_m = const_cast< SpMat<eT>& >(d.m);
const uword d_n_elem = d.n_elem;
const uword d_row_offset = d.row_offset;
const uword d_col_offset = d.col_offset;
const SpProxy<T1> P( o.get_ref() );
arma_debug_check
(
( (d_n_elem != P.get_n_elem()) || ((P.get_n_rows() != 1) && (P.get_n_cols() != 1)) ),
"spdiagview: given object has incompatible size"
);
if( SpProxy<T1>::must_use_iterator || P.is_alias(d_m) )
{
const SpMat<eT> tmp(P.Q);
if(tmp.n_cols == 1)
{
for(uword i=0; i < d_n_elem; ++i) { d_m.at(i + d_row_offset, i + d_col_offset) /= tmp.at(i,0); }
}
else
if(tmp.n_rows == 1)
{
for(uword i=0; i < d_n_elem; ++i) { d_m.at(i + d_row_offset, i + d_col_offset) /= tmp.at(0,i); }
}
}
else
{
if(P.get_n_cols() == 1)
{
for(uword i=0; i < d_n_elem; ++i) { d_m.at(i + d_row_offset, i + d_col_offset) /= P.at(i,0); }
}
else
if(P.get_n_rows() == 1)
{
for(uword i=0; i < d_n_elem; ++i) { d_m.at(i + d_row_offset, i + d_col_offset) /= P.at(0,i); }
}
}
}