Resize
Resize
Return a new matrix with a changed shape and size.
bool matrix::Resize(
const ulong rows, // new number or rows
const ulong cols, // new number or columns
const ulong reserve=0 // reserve amount in items
);
bool vector::Resize(
const ulong size, // new size.
const ulong reserve=0 // reserve amount in items.
);Parameters
- rows
[in] New number or rows.
- cols
[in] New number or columns.
Return Value
Returns true on success, false otherwise.
- Note
The matrix (or vector) is processed in place. No copies are created. Any size can be specified, i.e., rows_newcols_new!=rows_oldcols_old. Unlike Reshape, the matrix is processed row by row. When increasing the number of columns, the values of the extra columns are undefined. When increasing the number of rows, the values of elements in the new rows are undefined. When the number of columns is reduced, each row of the matrix is truncated.
Example
matrix matrix_a={{1,2,3},{4,5,6},{7,8,9},{10,11,12}};
Print("matrix_a\n",matrix_a);
matrix_a.Resize(2,6);
Print("Ressize(2,6)\n",matrix_a);
matrix_a.Resize(3,5);
Print("Resize(3,5)\n",matrix_a);
matrix_a.Resize(2,4);
Print("Resize(2,4)\n",matrix_a);
/*
matrix_a
[[1,2,3]
[4,5,6]
[7,8,9]
[10,11,12]]
Ressize(2,6)
[[1,2,3,4,5,6]
[4,5,6,10,11,12]]
Resize(3,5)
[[1,2,3,4,5]
[4,5,6,10,11]
[11,12,3,8,8]]
Resize(2,4)
[[1,2,3,4]
[4,5,6,10]]
*/Last updated on