Select one column or one line from a matrix

[vRltwE]

Hi,

I am using matrix

vector<vector<double> > matrix_tmp( cols , vector<double>( lines ) );

How I select a specific column or line?

There is something like matrix.get_line(3) ou matrix.get_column(7)?

[helios]

Vectors of vectors don't have the concept of rows or columns. If you need to iterate through a row or column, just go through v[i][row] or v[column][i] respectively.