#include <stdexcept>
#include "matrix.h"
-#include "archive.h"
#include "numeric.h"
#include "lst.h"
#include "idx.h"
#include "indexed.h"
-#include "utils.h"
-#include "debugmsg.h"
#include "power.h"
#include "symbol.h"
#include "normal.h"
+#include "print.h"
+#include "archive.h"
+#include "utils.h"
+#include "debugmsg.h"
namespace GiNaC {
// default ctor, dtor, copy ctor, assignment operator and helpers:
//////////
-// public
-
/** Default ctor. Initializes to 1 x 1-dimensional zero-matrix. */
matrix::matrix() : inherited(TINFO_matrix), row(1), col(1)
{
m.push_back(_ex0());
}
-// protected
-
-/** For use by copy ctor and assignment operator. */
void matrix::copy(const matrix & other)
{
inherited::copy(other);
m = other.m; // STL's vector copying invoked here
}
-void matrix::destroy(bool call_parent)
-{
- if (call_parent) inherited::destroy(call_parent);
-}
+DEFAULT_DESTROY(matrix)
//////////
// other ctors
debugmsg("matrix ctor from unsigned,unsigned,exvector",LOGLEVEL_CONSTRUCT);
}
+/** Construct matrix from (flat) list of elements. If the list has fewer
+ * elements than the matrix, the remaining matrix elements are set to zero.
+ * If the list has more elements than the matrix, the excessive elements are
+ * thrown away. */
+matrix::matrix(unsigned r, unsigned c, const lst & l)
+ : inherited(TINFO_matrix), row(r), col(c)
+{
+ debugmsg("matrix ctor from unsigned,unsigned,lst",LOGLEVEL_CONSTRUCT);
+ m.resize(r*c, _ex0());
+
+ for (unsigned i=0; i<l.nops(); i++) {
+ unsigned x = i % c;
+ unsigned y = i / c;
+ if (y >= r)
+ break; // matrix smaller than list: throw away excessive elements
+ m[y*c+x] = l.op(i);
+ }
+}
+
//////////
// archiving
//////////
-/** Construct object from archive_node. */
matrix::matrix(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
{
debugmsg("matrix ctor from archive_node", LOGLEVEL_CONSTRUCT);
}
}
-/** Unarchive the object. */
-ex matrix::unarchive(const archive_node &n, const lst &sym_lst)
-{
- return (new matrix(n, sym_lst))->setflag(status_flags::dynallocated);
-}
-
-/** Archive the object. */
void matrix::archive(archive_node &n) const
{
inherited::archive(n);
}
}
+DEFAULT_UNARCHIVE(matrix)
+
//////////
// functions overriding virtual functions from bases classes
//////////
// public
-void matrix::print(std::ostream & os, unsigned upper_precedence) const
+void matrix::print(const print_context & c, unsigned level) const
{
- debugmsg("matrix print",LOGLEVEL_PRINT);
- os << "[[ ";
- for (unsigned r=0; r<row-1; ++r) {
- os << "[[";
- for (unsigned c=0; c<col-1; ++c)
- os << m[r*col+c] << ",";
- os << m[col*(r+1)-1] << "]], ";
- }
- os << "[[";
- for (unsigned c=0; c<col-1; ++c)
- os << m[(row-1)*col+c] << ",";
- os << m[row*col-1] << "]] ]]";
-}
+ debugmsg("matrix print", LOGLEVEL_PRINT);
+
+ if (is_of_type(c, print_tree)) {
+
+ inherited::print(c, level);
+
+ } else {
+
+ c.s << "[[ ";
+ for (unsigned y=0; y<row-1; ++y) {
+ c.s << "[[";
+ for (unsigned x=0; x<col-1; ++x) {
+ m[y*col+x].print(c);
+ c.s << ",";
+ }
+ m[col*(y+1)-1].print(c);
+ c.s << "]], ";
+ }
+ c.s << "[[";
+ for (unsigned x=0; x<col-1; ++x) {
+ m[(row-1)*col+x].print(c);
+ c.s << ",";
+ }
+ m[row*col-1].print(c);
+ c.s << "]] ]]";
-void matrix::printraw(std::ostream & os) const
-{
- debugmsg("matrix printraw",LOGLEVEL_PRINT);
- os << class_name() << "(" << row << "," << col <<",";
- for (unsigned r=0; r<row-1; ++r) {
- os << "(";
- for (unsigned c=0; c<col-1; ++c)
- os << m[r*col+c] << ",";
- os << m[col*(r-1)-1] << "),";
}
- os << "(";
- for (unsigned c=0; c<col-1; ++c)
- os << m[(row-1)*col+c] << ",";
- os << m[row*col-1] << "))";
}
/** nops is defined to be rows x columns. */
return i.hold();
}
+/** Sum of two indexed matrices. */
+ex matrix::add_indexed(const ex & self, const ex & other) const
+{
+ GINAC_ASSERT(is_ex_of_type(self, indexed));
+ GINAC_ASSERT(is_ex_of_type(self.op(0), matrix));
+ GINAC_ASSERT(is_ex_of_type(other, indexed));
+ GINAC_ASSERT(self.nops() == 2 || self.nops() == 3);
+
+ // Only add two matrices
+ if (is_ex_of_type(other.op(0), matrix)) {
+ GINAC_ASSERT(other.nops() == 2 || other.nops() == 3);
+
+ const matrix &self_matrix = ex_to_matrix(self.op(0));
+ const matrix &other_matrix = ex_to_matrix(other.op(0));
+
+ if (self.nops() == 2 && other.nops() == 2) { // vector + vector
+
+ if (self_matrix.row == other_matrix.row)
+ return indexed(self_matrix.add(other_matrix), self.op(1));
+ else if (self_matrix.row == other_matrix.col)
+ return indexed(self_matrix.add(other_matrix.transpose()), self.op(1));
+
+ } else if (self.nops() == 3 && other.nops() == 3) { // matrix + matrix
+
+ if (self.op(1).is_equal(other.op(1)) && self.op(2).is_equal(other.op(2)))
+ return indexed(self_matrix.add(other_matrix), self.op(1), self.op(2));
+ else if (self.op(1).is_equal(other.op(2)) && self.op(2).is_equal(other.op(1)))
+ return indexed(self_matrix.add(other_matrix.transpose()), self.op(1), self.op(2));
+
+ }
+ }
+
+ // Don't know what to do, return unevaluated sum
+ return self + other;
+}
+
+/** Product of an indexed matrix with a number. */
+ex matrix::scalar_mul_indexed(const ex & self, const numeric & other) const
+{
+ GINAC_ASSERT(is_ex_of_type(self, indexed));
+ GINAC_ASSERT(is_ex_of_type(self.op(0), matrix));
+ GINAC_ASSERT(self.nops() == 2 || self.nops() == 3);
+
+ const matrix &self_matrix = ex_to_matrix(self.op(0));
+
+ if (self.nops() == 2)
+ return indexed(self_matrix.mul(other), self.op(1));
+ else // self.nops() == 3
+ return indexed(self_matrix.mul(other), self.op(1), self.op(2));
+}
+
/** Contraction of an indexed matrix with something else. */
bool matrix::contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const
{
}
+/** Product of matrix and scalar. */
+matrix matrix::mul(const numeric & other) const
+{
+ exvector prod(row * col);
+
+ for (unsigned r=0; r<row; ++r)
+ for (unsigned c=0; c<col; ++c)
+ prod[r*col+c] = m[r*col+c] * other;
+
+ return matrix(row, col, prod);
+}
+
+
/** operator() to access elements.
*
* @param ro row of element
return k;
}
-/** Convert list of lists to matrix. */
-ex lst_to_matrix(const ex &l)
+ex lst_to_matrix(const lst & l)
{
- if (!is_ex_of_type(l, lst))
- throw(std::invalid_argument("argument to lst_to_matrix() must be a lst"));
-
// Find number of rows and columns
unsigned rows = l.nops(), cols = 0, i, j;
for (i=0; i<rows; i++)
if (l.op(i).nops() > cols)
cols = l.op(i).nops();
-
+
// Allocate and fill matrix
matrix &m = *new matrix(rows, cols);
+ m.setflag(status_flags::dynallocated);
for (i=0; i<rows; i++)
for (j=0; j<cols; j++)
if (l.op(i).nops() > j)
return m;
}
+ex diag_matrix(const lst & l)
+{
+ unsigned dim = l.nops();
+
+ matrix &m = *new matrix(dim, dim);
+ m.setflag(status_flags::dynallocated);
+ for (unsigned i=0; i<dim; i++)
+ m.set(i, i, l.op(i));
+
+ return m;
+}
+
} // namespace GiNaC
git://www.ginac.de / ginac.git / blobdiff