/// <summary>
/// print the linear model as code
/// </summary>
public static void SaveAsCode(TextWriter writer, ref VBuffer <Float> weights, Float bias,
RoleMappedSchema schema, string codeVariable = "output")
{
Contracts.CheckValue(writer, nameof(writer));
Contracts.CheckValueOrNull(schema);
var featureNames = default(VBuffer <ReadOnlyMemory <char> >);
MetadataUtils.GetSlotNames(schema, RoleMappedSchema.ColumnRole.Feature, weights.Length, ref featureNames);
int numNonZeroWeights = 0;
writer.Write(codeVariable);
writer.Write(" = ");
VBufferUtils.ForEachDefined(ref weights,
(idx, value) =>
{
if (Math.Abs(value - 0) >= Epsilon)
{
if (numNonZeroWeights > 0)
{
writer.Write(" + ");
}
writer.Write(FloatUtils.ToRoundTripString(value));
writer.Write("*");
if (featureNames.Count > 0)
{
writer.Write(FeatureNameAsCode(featureNames.GetItemOrDefault(idx).ToString(), idx));
}
else
{
writer.Write("f_" + idx);
}
numNonZeroWeights++;
}
});
if (numNonZeroWeights > 0)
{
writer.Write(" + ");
}
writer.Write(FloatUtils.ToRoundTripString(bias));
writer.WriteLine(";");
}