arma_hot
inline
typename T1::elem_type
accu_proxy_at(const Proxy<T1>& P)
{
typedef typename T1::elem_type eT;
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
eT val = eT(0);
if(n_rows != 1)
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
val += P.at(row,col);
}
}
else
{
for(uword col=0; col < n_cols; ++col)
{
val += P.at(0,col);
}
}
return val;
}
arma_hot
inline
void
op_fft_cx::copy_vec_proxy(typename Proxy<T1>::elem_type* dest, const Proxy<T1>& P, const uword N)
{
arma_extra_debug_sigprint();
if(Proxy<T1>::use_at == false)
{
typename Proxy<T1>::ea_type X = P.get_ea();
for(uword i=0; i < N; ++i) { dest[i] = X[i]; }
}
else
{
if(P.get_n_cols() == 1)
{
for(uword i=0; i < N; ++i) { dest[i] = P.at(i,0); }
}
else
{
for(uword i=0; i < N; ++i) { dest[i] = P.at(0,i); }
}
}
}
arma_warn_unused
inline
typename T1::elem_type
det
(
const Op<T1, op_trimat>& X
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.m);
const uword N = P.get_n_rows();
arma_debug_check( (N != P.get_n_cols()), "det(): given matrix must be square sized" );
eT val1 = eT(1);
eT val2 = eT(1);
uword i,j;
for(i=0, j=1; j<N; i+=2, j+=2)
{
val1 *= P.at(i,i);
val2 *= P.at(j,j);
}
if(i < N)
{
val1 *= P.at(i,i);
}
return val1 * val2;
}
arma_hot
inline
typename T1::pod_type
arma_vec_norm_k
(
const Proxy<T1>& P,
const int k
)
{
arma_extra_debug_sigprint();
typedef typename T1::pod_type T;
T acc = T(0);
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type A = P.get_ea();
const uword N = P.get_n_elem();
uword i,j;
for(i=0, j=1; j<N; i+=2, j+=2)
{
acc += std::pow(std::abs(A[i]), k);
acc += std::pow(std::abs(A[j]), k);
}
if(i < N)
{
acc += std::pow(std::abs(A[i]), k);
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
if(n_rows != 1)
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
acc += std::pow(std::abs(P.at(row,col)), k);
}
}
else
{
for(uword col=0; col < n_cols; ++col)
{
acc += std::pow(std::abs(P.at(0,col)), k);
}
}
}
return std::pow(acc, T(1)/T(k));
}
inline
podarray<eT>::podarray(const Proxy<T1>& P)
: n_elem(P.get_n_elem())
{
arma_extra_debug_sigprint_this(this);
const uword P_n_elem = P.get_n_elem();
init_cold(P_n_elem);
eT* out_mem = (*this).memptr();
if(Proxy<T1>::use_at == false)
{
typename Proxy<T1>::ea_type A = P.get_ea();
uword i,j;
for(i=0, j=1; j < P_n_elem; i+=2, j+=2)
{
const eT val_i = A[i];
const eT val_j = A[j];
out_mem[i] = val_i;
out_mem[j] = val_j;
}
if(i < P_n_elem)
{
out_mem[i] = A[i];
}
}
else
{
const uword P_n_rows = P.get_n_rows();
const uword P_n_cols = P.get_n_cols();
if(P_n_rows != 1)
{
uword count = 0;
for(uword col=0; col < P_n_cols; ++col)
for(uword row=0; row < P_n_rows; ++row, ++count)
{
out_mem[count] = P.at(row,col);
}
}
else
{
for(uword col=0; col < P_n_cols; ++col)
{
out_mem[col] = P.at(0,col);
}
}
}
}
arma_hot
inline
typename T1::pod_type
arma_vec_norm_1(const Proxy<T1>& A)
{
arma_extra_debug_sigprint();
typedef typename T1::pod_type T;
T acc = T(0);
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type P = A.get_ea();
const uword N = A.get_n_elem();
uword i,j;
for(i=0, j=1; j<N; i+=2, j+=2)
{
acc += std::abs(P[i]);
acc += std::abs(P[j]);
}
if(i < N)
{
acc += std::abs(P[i]);
}
}
else
{
const uword n_rows = A.get_n_rows();
const uword n_cols = A.get_n_cols();
for(uword col=0; col<n_cols; ++col)
{
uword i,j;
for(i=0, j=1; j<n_rows; i+=2, j+=2)
{
acc += std::abs(A.at(i,col));
acc += std::abs(A.at(j,col));
}
if(i < n_rows)
{
acc += std::abs(A.at(i,col));
}
}
}
return acc;
}
arma_hot
inline
typename T1::pod_type
arma_vec_norm_2
(
const Proxy<T1>& P,
const typename arma_cx_only<typename T1::elem_type>::result* junk = 0
)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
typedef typename T1::pod_type T;
T acc = T(0);
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type A = P.get_ea();
const uword N = P.get_n_elem();
for(uword i=0; i<N; ++i)
{
const T tmp = std::abs(A[i]);
acc += tmp*tmp;
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
if(n_rows == 1)
{
for(uword col=0; col<n_cols; ++col)
{
const T tmp = std::abs(P.at(0,col));
acc += tmp*tmp;
}
}
else
{
for(uword col=0; col<n_cols; ++col)
for(uword row=0; row<n_rows; ++row)
{
const T tmp = std::abs(P.at(row,col));
acc += tmp*tmp;
}
}
}
return std::sqrt(acc);
}
arma_hot
inline
void
op_sum::apply_noalias_proxy(Mat<typename T1::elem_type>& out, const Proxy<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)
{
out.set_size(1, P_n_cols);
eT* out_mem = out.memptr();
for(uword col=0; col < P_n_cols; ++col)
{
eT val1 = eT(0);
eT val2 = eT(0);
uword i,j;
for(i=0, j=1; j < P_n_rows; i+=2, j+=2)
{
val1 += P.at(i,col);
val2 += P.at(j,col);
}
if(i < P_n_rows)
{
val1 += P.at(i,col);
}
out_mem[col] = (val1 + val2);
}
}
else
{
out.zeros(P_n_rows, 1);
eT* out_mem = out.memptr();
for(uword col=0; col < P_n_cols; ++col)
for(uword row=0; row < P_n_rows; ++row)
{
out_mem[row] += P.at(row,col);
}
}
}
inline
arma_warn_unused
uword
accu(const mtOp<uword,T1,op_rel_noteq>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const eT val = X.aux;
const Proxy<T1> P(X.m);
uword n_nonzero = 0;
if(Proxy<T1>::prefer_at_accessor == false)
{
typedef typename Proxy<T1>::ea_type ea_type;
ea_type A = P.get_ea();
const uword n_elem = P.get_n_elem();
for(uword i=0; i<n_elem; ++i)
{
if(A[i] != val) { ++n_nonzero; }
}
}
else
{
const uword P_n_cols = P.get_n_cols();
const uword P_n_rows = P.get_n_rows();
if(P_n_rows == 1)
{
for(uword col=0; col < P_n_cols; ++col)
{
if(P.at(0,col) != val) { ++n_nonzero; }
}
}
else
{
for(uword col=0; col < P_n_cols; ++col)
for(uword row=0; row < P_n_rows; ++row)
{
if(P.at(row,col) != val) { ++n_nonzero; }
}
}
}
return n_nonzero;
}
inline
arma_warn_unused
typename
enable_if2
<(is_arma_type<T1>::value) && (is_arma_sparse_type<T2>::value) && (is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
typename T1::elem_type
>::result
dot
(
const Base<typename T1::elem_type, T1>& x,
const SpBase<typename T2::elem_type, T2>& y
)
{
arma_extra_debug_sigprint();
const Proxy<T1> pa(x.get_ref());
const SpProxy<T2> pb(y.get_ref());
arma_debug_assert_same_size(pa.get_n_rows(), pa.get_n_cols(), pb.get_n_rows(), pb.get_n_cols(), "dot()");
typedef typename T1::elem_type eT;
eT result = eT(0);
typename SpProxy<T2>::const_iterator_type it = pb.begin();
// prefer_at_accessor won't save us operations
while(it.pos() < pb.get_n_nonzero())
{
result += (*it) * pa.at(it.row(), it.col());
++it;
}
return result;
}
inline
bool
op_any::any_vec_helper(const Base<typename T1::elem_type, T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.get_ref());
const uword n_elem = P.get_n_elem();
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i<n_elem; ++i)
{
if(Pea[i] != eT(0)) { return true; }
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
if(P.at(row,col) != eT(0)) { return true; }
}
}
return false;
}
inline
void
op_vectorise_row::apply_proxy(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
if(P.is_alias(out) == false)
{
out.set_size( 1, P.get_n_elem() );
eT* outmem = out.memptr();
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
for(uword row=0; row < n_rows; ++row)
{
uword i,j;
for(i=0, j=1; j < n_cols; i+=2, j+=2)
{
const eT tmp_i = P.at(row,i);
const eT tmp_j = P.at(row,j);
*outmem = tmp_i; outmem++;
*outmem = tmp_j; outmem++;
}
if(i < n_cols)
{
*outmem = P.at(row,i); outmem++;
}
}
}
else // we have aliasing
{
arma_extra_debug_print("op_vectorise_row::apply(): aliasing detected");
Mat<eT> tmp;
op_vectorise_row::apply_proxy(tmp, P);
out.steal_mem(tmp);
}
}
inline
void
op_diagmat2::apply(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword row_offset, const uword col_offset)
{
arma_extra_debug_sigprint();
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
const uword n_elem = P.get_n_elem();
if(n_elem == 0) { out.reset(); return; }
const bool P_is_vec = (T1::is_row) || (T1::is_col) || (n_rows == 1) || (n_cols == 1);
if(P_is_vec)
{
const uword n_pad = (std::max)(row_offset, col_offset);
out.zeros(n_elem + n_pad, n_elem + n_pad);
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i < n_elem; ++i)
{
out.at(row_offset + i, col_offset + i) = Pea[i];
}
}
else
{
const unwrap<typename Proxy<T1>::stored_type> U(P.Q);
const Proxy<typename unwrap<typename Proxy<T1>::stored_type>::stored_type> PP(U.M);
op_diagmat2::apply(out, PP, row_offset, col_offset);
}
}
else // P represents a matrix
{
arma_debug_check
(
((row_offset > 0) && (row_offset >= n_rows)) || ((col_offset > 0) && (col_offset >= n_cols)),
"diagmat(): requested diagonal out of bounds"
);
out.zeros(n_rows, n_cols);
const uword N = (std::min)(n_rows - row_offset, n_cols - col_offset);
for(uword i=0; i<N; ++i)
{
const uword row = i + row_offset;
const uword col = i + col_offset;
out.at(row,col) = P.at(row,col);
}
}
}
inline
void
glue_max::apply(Mat< std::complex<T> >& out, const Proxy<T1>& PA, const Proxy<T2>& PB)
{
arma_extra_debug_sigprint();
typedef typename std::complex<T> eT;
const uword n_rows = PA.get_n_rows();
const uword n_cols = PA.get_n_cols();
arma_debug_assert_same_size(n_rows, n_cols, PB.get_n_rows(), PB.get_n_cols(), "max(): given matrices must have the same size");
out.set_size(n_rows, n_cols);
eT* out_mem = out.memptr();
if( (Proxy<T1>::use_at == false) && (Proxy<T2>::use_at == false) )
{
typename Proxy<T1>::ea_type A = PA.get_ea();
typename Proxy<T2>::ea_type B = PB.get_ea();
const uword N = PA.get_n_elem();
for(uword i=0; i<N; ++i)
{
const eT A_val = A[i];
const eT B_val = B[i];
out_mem[i] = ( std::abs(A_val) > std::abs(B_val) ) ? A_val : B_val;
}
}
else
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
const eT A_val = PA.at(row,col);
const eT B_val = PB.at(row,col);
*out_mem = ( std::abs(A_val) > std::abs(B_val) ) ? A_val : B_val;
++out_mem;
}
}
}
inline
void
op_clamp::apply_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const typename T1::elem_type min_val, const typename T1::elem_type max_val)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
out.set_size(n_rows, n_cols);
eT* out_mem = out.memptr();
if(Proxy<T1>::use_at == false)
{
const uword N = P.get_n_elem();
typename Proxy<T1>::ea_type A = P.get_ea();
uword j;
for(j=1; j<N; j+=2)
{
eT val_i = A[j-1];
eT val_j = A[j ];
val_i = (val_i < min_val) ? min_val : ((val_i > max_val) ? max_val : val_i);
val_j = (val_j < min_val) ? min_val : ((val_j > max_val) ? max_val : val_j);
(*out_mem) = val_i; out_mem++;
(*out_mem) = val_j; out_mem++;
}
const uword i = j-1;
if(i < N)
{
eT val_i = A[i];
val_i = (val_i < min_val) ? min_val : ((val_i > max_val) ? max_val : val_i);
(*out_mem) = val_i;
}
}
else
{
for(uword col=0; col<n_cols; ++col)
for(uword row=0; row<n_rows; ++row)
{
eT val = P.at(row,col);
val = (val < min_val) ? min_val : ((val > max_val) ? max_val : val);
(*out_mem) = val; out_mem++;
}
}
}
arma_hot
inline
typename T1::elem_type
accu(const Base<typename T1::elem_type,T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
typedef typename Proxy<T1>::ea_type ea_type;
const Proxy<T1> A(X.get_ref());
if(Proxy<T1>::prefer_at_accessor == false)
{
ea_type P = A.get_ea();
const uword n_elem = A.get_n_elem();
eT val1 = eT(0);
eT val2 = eT(0);
uword i,j;
for(i=0, j=1; j<n_elem; i+=2, j+=2)
{
val1 += P[i];
val2 += P[j];
}
if(i < n_elem)
{
val1 += P[i];
}
return val1 + val2;
}
else
{
const uword n_rows = A.get_n_rows();
const uword n_cols = A.get_n_cols();
eT val = eT(0);
for(uword col=0; col<n_cols; ++col)
{
for(uword row=0; row<n_rows; ++row)
{
val += A.at(row,col);
}
}
return val;
}
}
inline
void
glue_max::apply(Mat<eT>& out, const Proxy<T1>& PA, const Proxy<T2>& PB)
{
arma_extra_debug_sigprint();
const uword n_rows = PA.get_n_rows();
const uword n_cols = PA.get_n_cols();
arma_debug_assert_same_size(n_rows, n_cols, PB.get_n_rows(), PB.get_n_cols(), "max(): given matrices must have the same size");
out.set_size(n_rows, n_cols);
eT* out_mem = out.memptr();
if( (Proxy<T1>::use_at == false) && (Proxy<T2>::use_at == false) )
{
typename Proxy<T1>::ea_type A = PA.get_ea();
typename Proxy<T2>::ea_type B = PB.get_ea();
const uword N = PA.get_n_elem();
for(uword i=0; i<N; ++i)
{
out_mem[i] = (std::max)(A[i], B[i]);
}
}
else
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
*out_mem = (std::max)( PA.at(row,col), PB.at(row,col) );
++out_mem;
}
}
}
inline
void
glue_mixed_plus::apply(Mat<typename eT_promoter<T1,T2>::eT>& out, const mtGlue<typename eT_promoter<T1,T2>::eT, T1, T2, glue_mixed_plus>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT1;
typedef typename T2::elem_type eT2;
typedef typename promote_type<eT1,eT2>::result out_eT;
promote_type<eT1,eT2>::check();
const Proxy<T1> A(X.A);
const Proxy<T2> B(X.B);
arma_debug_assert_same_size(A, B, "addition");
const uword n_rows = A.get_n_rows();
const uword n_cols = A.get_n_cols();
out.set_size(n_rows, n_cols);
out_eT* out_mem = out.memptr();
const uword n_elem = out.n_elem;
const bool prefer_at_accessor = (Proxy<T1>::prefer_at_accessor || Proxy<T2>::prefer_at_accessor);
if(prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type AA = A.get_ea();
typename Proxy<T2>::ea_type BB = B.get_ea();
for(uword i=0; i<n_elem; ++i)
{
out_mem[i] = upgrade_val<eT1,eT2>::apply(AA[i]) + upgrade_val<eT1,eT2>::apply(BB[i]);
}
}
else
{
uword i = 0;
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
out_mem[i] = upgrade_val<eT1,eT2>::apply(A.at(row,col)) + upgrade_val<eT1,eT2>::apply(B.at(row,col));
++i;
}
}
}
inline
arma_warn_unused
typename T1::elem_type
det
(
const Op<T1, op_trimat>& X,
const bool slow = false
)
{
arma_extra_debug_sigprint();
arma_ignore(slow);
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.m);
const uword N = P.get_n_rows();
arma_debug_check( (N != P.get_n_cols()), "det(): matrix is not square" );
eT val1 = eT(1);
eT val2 = eT(1);
uword i,j;
for(i=0, j=1; j<N; i+=2, j+=2)
{
val1 *= P.at(i,i);
val2 *= P.at(j,j);
}
if(i < N)
{
val1 *= P.at(i,i);
}
return val1 * val2;
}
inline
uword
op_find::helper
(
Mat<uword>& indices,
const Base<typename T1::elem_type, T1>& X
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> A(X.get_ref());
const uword n_elem = A.get_n_elem();
indices.set_size(n_elem, 1);
uword* indices_mem = indices.memptr();
uword n_nz = 0;
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type PA = A.get_ea();
for(uword i=0; i<n_elem; ++i)
{
if(PA[i] != eT(0)) { indices_mem[n_nz] = i; ++n_nz; }
}
}
else
{
const uword n_rows = A.get_n_rows();
const uword n_cols = A.get_n_cols();
uword i = 0;
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
if(A.at(row,col) != eT(0)) { indices_mem[n_nz] = i; ++n_nz; }
++i;
}
}
return n_nz;
}
inline
typename
enable_if2
<
(is_arma_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
Mat<typename T1::elem_type>
>::result
operator/
(
const Base<typename T1::elem_type, T1>& x,
const SpBase<typename T2::elem_type, T2>& y
)
{
arma_extra_debug_sigprint();
const Proxy<T1> pa(x.get_ref());
const SpProxy<T2> pb(y.get_ref());
arma_debug_assert_same_size(pa.get_n_rows(), pa.get_n_cols(), pb.get_n_rows(), pb.get_n_cols(), "element-wise division");
Mat<typename T1::elem_type> result(pa.get_n_rows(), pa.get_n_cols());
result.fill(Datum<typename T1::elem_type>::inf);
// Now divide each element
typename SpProxy<T2>::const_iterator_type it = pb.begin();
while(it.pos() < pb.get_n_nonzero())
{
if(Proxy<T1>::prefer_at_accessor == false)
{
const uword index = (it.col() * result.n_rows) + it.row();
result[index] = pa[index] / (*it);
}
else
{
result.at(it.row(), it.col()) = pa.at(it.row(), it.col()) / (*it);
}
++it;
}
return result;
}
inline
void
op_nonzeros::apply_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword N_max = P.get_n_elem();
Mat<eT> tmp(N_max, 1);
eT* tmp_mem = tmp.memptr();
uword N_nz = 0;
if(Proxy<T1>::use_at == false)
{
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i<N_max; ++i)
{
const eT val = Pea[i];
if(val != eT(0)) { tmp_mem[N_nz] = val; ++N_nz; }
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
const eT val = P.at(row,col);
if(val != eT(0)) { tmp_mem[N_nz] = val; ++N_nz; }
}
}
out.steal_mem_col(tmp, N_nz);
}
inline
void
op_cx_scalar_plus::apply
(
Mat< typename std::complex<typename T1::pod_type> >& out,
const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_plus>& X
)
{
arma_extra_debug_sigprint();
typedef typename std::complex<typename T1::pod_type> eT;
const Proxy<T1> A(X.m);
const uword n_rows = A.get_n_rows();
const uword n_cols = A.get_n_cols();
out.set_size(n_rows, n_cols);
const eT k = X.aux_out_eT;
eT* out_mem = out.memptr();
if(Proxy<T1>::prefer_at_accessor == false)
{
const uword n_elem = A.get_n_elem();
for(uword i=0; i<n_elem; ++i)
{
out_mem[i] = A[i] + k;
}
}
else
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
*out_mem = A.at(row,col) + k; ++out_mem;
}
}
}
inline
void
op_abs::apply( Mat<typename T1::pod_type>& out, const mtOp<typename T1::pod_type, T1, op_abs>& X )
{
arma_extra_debug_sigprint();
typedef typename T1::pod_type T;
const Proxy<T1> P(X.m);
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
out.set_size(n_rows, n_cols);
T* out_mem = out.memptr();
if(Proxy<T1>::prefer_at_accessor == false)
{
typedef typename Proxy<T1>::ea_type ea_type;
const uword n_elem = P.get_n_elem();
ea_type A = P.get_ea();
for(uword i=0; i < n_elem; ++i)
{
out_mem[i] = std::abs( A[i] );
}
}
else
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
*out_mem = std::abs( P.at(row,col) );
out_mem++;
}
}
}
inline
void
op_fliplr::apply_proxy_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
{
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();
const uword P_n_cols_m1 = P_n_cols - 1;
out.set_size(P_n_rows, P_n_cols);
if( ((T1::is_row) || (P_n_rows == 1)) && (Proxy<T1>::use_at == false) )
{
eT* out_mem = out.memptr();
const typename Proxy<T1>::ea_type P_ea = P.get_ea();
for(uword col=0; col < P_n_cols; ++col)
{
out_mem[P_n_cols_m1 - col] = P_ea[col];
}
}
else
{
for(uword col=0; col < P_n_cols; ++col)
{
eT* out_colmem = out.colptr(P_n_cols_m1 - col);
for(uword row=0; row < P_n_rows; ++row)
{
out_colmem[row] = P.at(row,col);
}
}
}
}
inline
bool
op_all::all_vec_helper(const Base<typename T1::elem_type, T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.get_ref());
const uword n_elem = P.get_n_elem();
uword count = 0;
if(Proxy<T1>::prefer_at_accessor == false)
{
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i<n_elem; ++i)
{
if(Pea[i] != eT(0)) { ++count; }
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
if(P.at(row,col) != eT(0)) { ++count; }
}
}
// NOTE: for empty vectors it makes more sense to return false, but we need to return true for compatability with Octave
return (n_elem == count);
}
inline
arma_warn_unused
typename T1::elem_type
trace(const Base<typename T1::elem_type,T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> A(X.get_ref());
arma_debug_check( (A.get_n_rows() != A.get_n_cols()), "trace(): matrix must be square sized" );
const uword N = A.get_n_rows();
eT val = eT(0);
for(uword i=0; i<N; ++i)
{
val += A.at(i,i);
}
return val;
}
inline
typename T1::elem_type
op_prod::prod(const Base<typename T1::elem_type,T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.get_ref());
eT val = eT(1);
if(Proxy<T1>::prefer_at_accessor == false)
{
typedef typename Proxy<T1>::ea_type ea_type;
const ea_type A = P.get_ea();
const uword n_elem = P.get_n_elem();
uword i,j;
for(i=0, j=1; j < n_elem; i+=2, j+=2)
{
val *= A[i];
val *= A[j];
}
if(i < n_elem)
{
val *= A[i];
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
if(n_rows == 1)
{
uword i,j;
for(i=0, j=1; j < n_cols; i+=2, j+=2)
{
val *= P.at(0,i);
val *= P.at(0,j);
}
if(i < n_cols)
{
val *= P.at(0,i);
}
}
else
{
for(uword col=0; col < n_cols; ++col)
{
uword i,j;
for(i=0, j=1; j < n_rows; i+=2, j+=2)
{
val *= P.at(i,col);
val *= P.at(j,col);
}
if(i < n_rows)
{
val *= P.at(i,col);
}
}
}
}
return val;
}
inline
typename arma_cx_only<typename T1::elem_type>::result
op_min::min(const Base<typename T1::elem_type,T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
typedef typename get_pod_type<eT>::result T;
const Proxy<T1> P(X.get_ref());
const uword n_elem = P.get_n_elem();
arma_debug_check( (n_elem == 0), "min(): given object has no elements" );
T min_val = priv::most_pos<T>();
if(Proxy<T1>::prefer_at_accessor == false)
{
typedef typename Proxy<T1>::ea_type ea_type;
ea_type A = P.get_ea();
uword index = 0;
for(uword i=0; i<n_elem; ++i)
{
const T tmp = std::abs(A[i]);
if(tmp < min_val)
{
min_val = tmp;
index = i;
}
}
return( A[index] );
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
uword best_row = 0;
uword best_col = 0;
if(n_rows == 1)
{
for(uword col=0; col < n_cols; ++col)
{
const T tmp = std::abs(P.at(0,col));
if(tmp < min_val)
{
min_val = tmp;
best_col = col;
}
}
}
else
{
for(uword col=0; col < n_cols; ++col)
for(uword row=0; row < n_rows; ++row)
{
const T tmp = std::abs(P.at(row,col));
if(tmp < min_val)
{
min_val = tmp;
best_row = row;
best_col = col;
}
}
}
return P.at(best_row, best_col);
}
}
inline
typename arma_not_cx<typename T1::elem_type>::result
op_min::min(const Base<typename T1::elem_type,T1>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X.get_ref());
const uword n_elem = P.get_n_elem();
arma_debug_check( (n_elem == 0), "min(): given object has no elements" );
eT min_val = priv::most_pos<eT>();
if(Proxy<T1>::prefer_at_accessor == false)
{
typedef typename Proxy<T1>::ea_type ea_type;
ea_type A = P.get_ea();
uword i,j;
for(i=0, j=1; j<n_elem; i+=2, j+=2)
{
const eT tmp_i = A[i];
const eT tmp_j = A[j];
if(tmp_i < min_val) { min_val = tmp_i; }
if(tmp_j < min_val) { min_val = tmp_j; }
}
if(i < n_elem)
{
const eT tmp_i = A[i];
if(tmp_i < min_val) { min_val = tmp_i; }
}
}
else
{
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
if(n_rows == 1)
{
uword i,j;
for(i=0, j=1; j < n_cols; i+=2, j+=2)
{
const eT tmp_i = P.at(0,i);
const eT tmp_j = P.at(0,j);
if(tmp_i < min_val) { min_val = tmp_i; }
if(tmp_j < min_val) { min_val = tmp_j; }
}
if(i < n_cols)
{
const eT tmp_i = P.at(0,i);
if(tmp_i < min_val) { min_val = tmp_i; }
}
}
else
{
for(uword col=0; col < n_cols; ++col)
{
uword i,j;
for(i=0, j=1; j < n_rows; i+=2, j+=2)
{
const eT tmp_i = P.at(i,col);
const eT tmp_j = P.at(j,col);
if(tmp_i < min_val) { min_val = tmp_i; }
if(tmp_j < min_val) { min_val = tmp_j; }
}
if(i < n_rows)
{
const eT tmp_i = P.at(i,col);
if(tmp_i < min_val) { min_val = tmp_i; }
}
}
}
}
return min_val;
}
