private BootstrapSamplingTransformer(IHost host, ModelLoadContext ctx, IDataView input)
: base(host, input)
{
host.AssertValue(ctx);
host.AssertValue(input);
// *** Binary format ***
// byte: is the compliment sample, that is, an out-of-bag sample
// uint: seed0
// uint: seed1
// uint: seed2
// uint: seed3
// byte: input source should be shuffled
// int: size of the output pool size
_complement = ctx.Reader.ReadBoolByte();
_state = TauswortheHybrid.State.Load(ctx.Reader);
_shuffleInput = ctx.Reader.ReadBoolByte();
_poolSize = ctx.Reader.ReadInt32();
Host.CheckDecode(_poolSize >= 0);
}
public TransformInfo(IHost host, ApproximatedKernelMappingEstimator.ColumnOptions column, int d, float avgDist)
{
Contracts.AssertValue(host);
SrcDim = d;
NewDim = column.Rank;
host.CheckUserArg(NewDim > 0, nameof(column.Rank));
_useSin = column.UseCosAndSinBases;
var seed = column.Seed;
_rand = seed.HasValue ? RandomUtils.Create(seed) : RandomUtils.Create(host.Rand);
_state = _rand.GetState();
var generator = column.Generator;
_matrixGenerator = generator.GetRandomNumberGenerator(avgDist);
int roundedUpD = RoundUp(NewDim, _cfltAlign);
int roundedUpNumFeatures = RoundUp(SrcDim, _cfltAlign);
RndFourierVectors = new AlignedArray(roundedUpD * roundedUpNumFeatures, CpuMathUtils.GetVectorAlignment());
RotationTerms = _useSin ? null : new AlignedArray(roundedUpD, CpuMathUtils.GetVectorAlignment());
InitializeFourierCoefficients(roundedUpNumFeatures, roundedUpD);
}
public TransformInfo(IHostEnvironment env, ModelLoadContext ctx, int colValueCount, string directoryName)
{
env.AssertValue(env);
env.Assert(colValueCount > 0);
// *** Binary format ***
// int: d (number of untransformed features)
// int: NewDim (number of transformed features)
// bool: UseSin
// uint[4]: the seeds for the pseudo random number generator.
SrcDim = ctx.Reader.ReadInt32();
env.CheckDecode(SrcDim == colValueCount);
NewDim = ctx.Reader.ReadInt32();
env.CheckDecode(NewDim > 0);
_useSin = ctx.Reader.ReadBoolByte();
var length = ctx.Reader.ReadInt32();
env.CheckDecode(length == 4);
_state = TauswortheHybrid.State.Load(ctx.Reader);
_rand = new TauswortheHybrid(_state);
env.CheckDecode(ctx.Repository != null &&
ctx.LoadModelOrNull <IFourierDistributionSampler, SignatureLoadModel>(env, out _matrixGenerator, directoryName));
// initialize the transform matrix
int roundedUpD = RoundUp(NewDim, _cfltAlign);
int roundedUpNumFeatures = RoundUp(SrcDim, _cfltAlign);
RndFourierVectors = new AlignedArray(roundedUpD * roundedUpNumFeatures, CpuMathUtils.GetVectorAlignment());
RotationTerms = _useSin ? null : new AlignedArray(roundedUpD, CpuMathUtils.GetVectorAlignment());
InitializeFourierCoefficients(roundedUpNumFeatures, roundedUpD);
}
