public Trfm DeltaAvarage(int a, int b)
{
var deltaTimedTrfm = Delta(a, b);
var dv = deltaTimedTrfm.Value;
return(Trfm.Multiple(dv, 1 / deltaTimedTrfm.Key));
}
public TimedTrfm Delta(int a, int b)
{
var ret = new TimedTrfm();
if (a == b)
{
return(ret.Set(0, new Trfm()));
}
if (a > b)
{
Switch(ref a, ref b);
}
var _a = mRecords [a];
var _b = mRecords [b];
var delta = _b.Key - _a.Key;
var d = Trfm.Add(_b.Value, Trfm.Multiple(_a.Value, -1));
return(ret.Set(delta, d));
}