public void Init()
{
// number of categories includes zero'th category: "unknown"
ncategories = categoryList == null ? 0 : categoryList.Count + 1;
minVal = 0;
maxVal = ncategories - 1;
try
{
scalarEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.N(this.n)
.W(this.w)
.Radius(this.radius)
.MinVal(this.minVal)
.MaxVal(this.maxVal)
.Periodic(this.periodic)
.Forced(this.forced).Build();
}
catch (Exception e)
{
string msg = null;
int idx = -1;
if ((idx = (msg = e.Message).IndexOf("ScalarEncoder")) != -1)
{
msg = msg.Substring(0, idx) + "CategoryEncoder";
throw new InvalidOperationException(msg);
}
}
indexToCategory.Add(0, "<UNKNOWN>");
if (categoryList != null && categoryList.Any())
{
int len = categoryList.Count;
for (int i = 0; i < len; i++)
{
categoryToIndex.Add(categoryList[i], i + 1);
indexToCategory.Add(i + 1, categoryList[i]);
}
}
width = n = w * ncategories;
//TODO this is what the CategoryEncoder was doing before I added the ScalarEncoder delegate.
//I'm concerned because we're changing n without calling init again on the scalar encoder.
//In other words, if I move the scalarEncoder = ...build() from to here, the test cases fail
//which indicates significant fragility and at some level a violation of encapsulation.
//scalarEncoder.N = n;
scalarEncoder.SetN(n);
if (GetWidth() != width)
{
throw new InvalidOperationException(
"Width != w (num bits to represent output item) * #categories");
}
description.Add(new Tuple(name, 0));
}
/**
* w -- number of bits to set in output
* minval -- minimum input value. must be greater than 0. Lower values are
* reset to this value
* maxval -- maximum input value (input is strictly less if periodic == True)
* periodic -- If true, then the input value "wraps around" such that minval =
* maxval For a periodic value, the input must be strictly less than
* maxval, otherwise maxval is a true upper bound.
*
* Exactly one of n, radius, resolution must be set. "0" is a special
* value that means "not set".
* n -- number of bits in the representation (must be > w)
* radius -- inputs separated by more than this distance in log space will have
* non-overlapping representations
* resolution -- The minimum change in scaled value needed to produce a change
* in encoding. This should be specified in log space. For
* example, the scaled values 10 and 11 will be distinguishable
* in the output. In terms of the original input values, this
* means 10^1 (1) and 10^1.1 (1.25) will be distinguishable.
* name -- an optional string which will become part of the description
* clipInput -- if true, non-periodic inputs smaller than minval or greater
* than maxval will be clipped to minval/maxval
* forced -- (default False), if True, skip some safety checks
*/
public void Init()
{
double lowLimit = 1e-07;
// w defaults to 5
if (GetW() == 0)
{
SetW(5);
}
// maxVal defaults to 10000.
if (GetMaxVal() == 0.0)
{
SetMaxVal(10000);
}
if (GetMinVal() < lowLimit)
{
SetMinVal(lowLimit);
}
if (GetMinVal() >= GetMaxVal())
{
throw new InvalidOperationException("Max val must be larger than min val or the lower limit " +
"for this encoder " + string.Format("{0:#.0000000}", lowLimit));
}
_minScaledValue = Math.Log10(GetMinVal());
_maxScaledValue = Math.Log10(GetMaxVal());
if (_minScaledValue >= _maxScaledValue)
{
throw new InvalidOperationException("Max val must be larger, in log space, than min val.");
}
// There are three different ways of thinking about the representation. Handle
// each case here.
_encoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W(GetW())
.MinVal(_minScaledValue)
.MaxVal(_maxScaledValue)
.Periodic(false)
.N(GetN())
.Radius(GetRadius())
.Resolution(GetResolution())
.ClipInput(ClipInput())
.Forced(IsForced())
.Name(GetName())
.Build();
SetN(_encoder.GetN());
SetResolution(_encoder.GetResolution());
SetRadius(_encoder.GetRadius());
}
/**
* Open up for internal Network API use.
* Returns an {@link Encoder.Builder} which corresponds to the specified name.
* @param encoderName
* @return
*/
public IBuilder GetBuilder(string encoderName)
{
switch (encoderName)
{
case "CategoryEncoder":
return(CategoryEncoder.GetBuilder());
case "CoordinateEncoder":
return(CoordinateEncoder.GetBuilder());
case "GeospatialCoordinateEncoder":
return(GeospatialCoordinateEncoder.GetGeobuilder());
case "LogEncoder":
return(LogEncoder.GetBuilder());
case "PassThroughEncoder":
return(PassThroughEncoder <int[]> .GetBuilder());
case "ScalarEncoder":
return(ScalarEncoder.GetBuilder());
case "AdaptiveScalarEncoder":
return(AdaptiveScalarEncoder.GetAdaptiveBuilder());
case "SparsePassThroughEncoder":
return(SparsePassThroughEncoder.GetSparseBuilder());
case "SDRCategoryEncoder":
return(SDRCategoryEncoder.GetBuilder());
case "RandomDistributedScalarEncoder":
return(RandomDistributedScalarEncoder.GetBuilder());
case "DateEncoder":
return(DateEncoder.GetBuilder());
case "DeltaEncoder":
return(DeltaEncoder.GetDeltaBuilder());
case "SDRPassThroughEncoder":
return(SDRPassThroughEncoder.GetSptBuilder());
default:
throw new ArgumentException("Invalid encoder: " + encoderName);
}
}
public override IEncoder Build()
{
//Must be instantiated so that super class can initialize
//boilerplate variables.
encoder = new ScalarEncoder();
//Call super class here
base.Build();
////////////////////////////////////////////////////////
// Implementing classes would do setting of specific //
// vars here together with any sanity checking //
////////////////////////////////////////////////////////
((ScalarEncoder)encoder).Init();
return((ScalarEncoder)encoder);
}
protected void AddChildEncoder(ScalarEncoder encoder)
{
AddEncoder(GetName() ?? string.Empty, encoder.GetName(), encoder);
}
/**
* Init the {@code DateEncoder} with parameters
*/
public void Init()
{
width = 0;
// Because most of the ScalarEncoder fields have less than 21 bits(recommended in
// ScalarEncoder.checkReasonableSettings), so for now we set forced to be true to
// override.
// TODO figure out how to remove this
SetForced(true);
// Note: The order of adding encoders matters, must be in the following
// season, dayOfWeek, weekend, customDays, holiday, timeOfDay
if (IsValidEncoderPropertyTuple(season))
{
seasonEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)season.Get(0))
.Radius((double)season.Get(1))
.MinVal(0)
.MaxVal(366)
.Periodic(true)
.Name("season")
.Forced(this.IsForced())
.Build();
AddChildEncoder(seasonEncoder);
}
if (IsValidEncoderPropertyTuple(dayOfWeek))
{
dayOfWeekEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)dayOfWeek.Get(0))
.Radius((double)dayOfWeek.Get(1))
.MinVal(0)
.MaxVal(7)
.Periodic(true)
.Name("day of week")
.Forced(this.IsForced())
.Build();
AddChildEncoder(dayOfWeekEncoder);
}
if (IsValidEncoderPropertyTuple(weekend))
{
weekendEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)weekend.Get(0))
.Radius((double)weekend.Get(1))
.MinVal(0)
.MaxVal(1)
.Periodic(false)
.Name("weekend")
.Forced(this.IsForced())
.Build();
AddChildEncoder(weekendEncoder);
}
if (IsValidEncoderPropertyTuple(customDays))
{
List <string> days = (List <string>)customDays.Get(1);
StringBuilder customDayEncoderName = new StringBuilder();
if (days.Count == 1)
{
customDayEncoderName.Append(days[0]);
}
else
{
foreach (string day in days)
{
customDayEncoderName.Append(day).Append(" ");
}
}
customDaysEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)customDays.Get(0))
.Radius(1)
.MinVal(0)
.MaxVal(1)
.Periodic(false)
.Name(customDayEncoderName.ToString())
.Forced(this.IsForced())
.Build();
//customDaysEncoder is special in naming
AddEncoder(GetName() ?? string.Empty, "customdays", customDaysEncoder);
AddCustomDays(days);
}
if (IsValidEncoderPropertyTuple(holiday))
{
holidayEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)holiday.Get(0))
.Radius((double)holiday.Get(1))
.MinVal(0)
.MaxVal(1)
.Periodic(false)
.Name("holiday")
.Forced(this.IsForced())
.Build();
AddChildEncoder(holidayEncoder);
}
if (IsValidEncoderPropertyTuple(timeOfDay))
{
timeOfDayEncoder = (ScalarEncoder)ScalarEncoder.GetBuilder()
.W((int)timeOfDay.Get(0))
.Radius((double)timeOfDay.Get(1))
.MinVal(0)
.MaxVal(24)
.Periodic(true)
.Name("time of day")
.Forced(this.IsForced())
.Build();
AddChildEncoder(timeOfDayEncoder);
}
}
