///<summary>
///</summary>
///<param name="i"></param>
///<returns></returns>
public SparseVector Column(int i)
{
var sp = new SparseVector(RowCount);
for (int j = 0; j < RowCount; j++)
{
sp.AddValue(j, this[j, i]);
}
return(sp);
}
///<summary>
///</summary>
///<param name="i"></param>
///<returns></returns>
public SparseVector Row(int i)
{
var sp = new SparseVector(ColumnCount);
for (int j = 0; j < ColumnCount; j++)
{
sp.AddValue(j, this[i, j]);
}
return(sp);
}
protected static SparseVector AdjacentDifference(SparseVector times)
{
int n = times.Length;
SparseVector timeDelays = new SparseVector(n);
double t = 0.0;
for (int i = 0; i < n; i++)
{
double ti = times.Data[i];
if (t > ti)
{
throw new ArgumentException("TODO: Sample times are not in ascending order");
}
timeDelays.AddValue(i, ti - t);
t = ti;
}
return(timeDelays);
}