protected void DebugChecking2(RoleMappedData td, ITrainer trainer)
{
var scorer = PredictorHelper.CreateDefaultScorer(Host, td, trainer.CreatePredictor());
if (trainer.PredictionKind == PredictionKind.Ranking)
{
string schemas = SchemaHelper.ToString(scorer.Schema);
if (!schemas.Contains("Score"))
{
throw Host.Except("Issue with the schema: {0}", schemas);
}
}
using (var cursor = scorer.GetRowCursor(i => true))
{
int ilab, ipred, ifeat;
cursor.Schema.TryGetColumnIndex(td.Schema.Label.Name, out ilab);
if (trainer.PredictionKind == PredictionKind.Ranking)
{
cursor.Schema.TryGetColumnIndex("Score", out ipred);
cursor.Schema.TryGetColumnIndex(td.Schema.Feature.Name, out ifeat);
var getter = cursor.GetGetter <uint>(ilab);
var fgetter = cursor.GetGetter <VBuffer <float> >(ifeat);
var pgetter = cursor.GetGetter <float>(ipred);
if (pgetter == null)
{
throw Host.Except("Issue with the schema: {0}", SchemaHelper.ToString(cursor.Schema));
}
uint lab = 0;
var counts = new Dictionary <uint, int>();
var counts_pred = new Dictionary <float, int>();
float pre = 0;
VBuffer <float> features = default(VBuffer <float>);
int nbrows = 0;
int err = 0;
while (cursor.MoveNext())
{
getter(ref lab);
pgetter(ref pre);
fgetter(ref features);
counts[lab] = counts.ContainsKey(lab) ? counts[lab] + 1 : 0;
counts_pred[pre] = counts_pred.ContainsKey(pre) ? counts_pred[pre] + 1 : 0;
if (trainer.PredictionKind == PredictionKind.Ranking)
{
var elab = features.Values[features.Count - 1];
if (pre > 0 && lab < 0)
{
++err;
}
}
else if (!lab.Equals(pre))
{
++err;
}
++nbrows;
}
if (nbrows == 0)
{
throw Host.Except("No results.");
}
if (err * 2 > nbrows)
{
throw Host.Except("No training.");
}
}
else
{
cursor.Schema.TryGetColumnIndex("PredictedLabel", out ipred);
var getter = cursor.GetGetter <bool>(ilab);
var pgetter = cursor.GetGetter <bool>(ipred);
var counts = new Dictionary <bool, int>();
var counts_pred = new Dictionary <bool, int>();
bool lab = false;
bool pre = false;
int nbrows = 0;
int err = 0;
while (cursor.MoveNext())
{
getter(ref lab);
pgetter(ref pre);
counts[lab] = counts.ContainsKey(lab) ? counts[lab] + 1 : 0;
counts_pred[pre] = counts_pred.ContainsKey(pre) ? counts_pred[pre] + 1 : 0;
if (!lab.Equals(pre))
{
++err;
}
++nbrows;
}
if (nbrows == 0)
{
throw Host.Except("No results.");
}
if (err * 2 > nbrows)
{
throw Host.Except("No training.");
}
}
}
}