Return a reference to the value of the specified row vector at the specified base-one index.
If the index is out of range, throw a std::out_of_range exception with the specified error message and index indicated.
- Template Parameters
-
- Parameters
-
| x | Row vector from which to get a value. |
| n | Column index plus 1. |
| error_msg | Error message if the index is out of range. |
| idx | Nested index level to report in error message if the index is out of range. |
- Returns
- Value of row vector at column
n - 1.
- Exceptions
-
| std::out_of_range | if idx is out of range. |
Definition at line 320 of file get_base1_lhs.hpp.