public static (IDictionary <string, IEnumerable <float> > weights, IDictionary <string, float> biases) GetModelParameters(TransformerChain <MulticlassPredictionTransformer <LinearMulticlassModelParameters> > modelForContributions, string[] categories)
{
var modelParameters = modelForContributions.Last() as MulticlassPredictionTransformer <LinearMulticlassModelParameters>;
VBuffer <float>[] weights = default;
modelParameters.Model.GetWeights(ref weights, out int _);
var weightsDictionary = new Dictionary <string, IEnumerable <float> >();
var i = 0;
foreach (var weight in weights)
{
weightsDictionary.Add(categories[i++], (weight as VBuffer <float>?).Value.DenseValues());
}
var biases = modelParameters.Model.GetBiases();
var biasesDictionary = new Dictionary <string, float>();
i = 0;
foreach (var bias in biases)
{
biasesDictionary.Add(categories[i++], bias);
}
return(weightsDictionary, biasesDictionary);
}