/// <returns>
/// A
/// <see cref="Vector"/>
/// of length this
/// <see cref="getColCount()"/>
/// with column
/// sums of these matrix entries
/// </returns>
public virtual fastmath.Vector sum()
{
fastmath.Vector sums = new fastmath.Vector(getColCount());
for (int i = 0; i < sums.size; i++)
{
sums.set(i, col(i).sum());
}
return(sums);
}
