// By default, set the weight to 1.0
public GaussianWeightedSumFactor(Variable<GaussianDistribution> sumVariable,
Variable<GaussianDistribution>[] variablesToSum)
: this(sumVariable,
variablesToSum,
variablesToSum.Select(v => 1.0).ToArray())
{
}
public GaussianWeightedSumFactor(Variable<GaussianDistribution> sumVariable,
Variable<GaussianDistribution>[] variablesToSum)
: this(sumVariable,
variablesToSum,
variablesToSum.Select(v => 1.0).ToArray()) // By default, set the weight to 1.0
{
}
public static FunctionTerm VectorScaling(int dimension)
{
if (dimension < 0)
{
throw new ArgumentOutOfRangeException("dimension");
}
Variable c = new Variable(1, "c");
Variable x = new Variable(dimension, "x");
return(new FunctionDefinition
(
string.Format("vector_scaling_{0}", dimension),
Vector
(
from index in Enumerable.Range(0, dimension)
select ApplyProduct(c, x.Select(index))
)
.Abstract(c, x),
new BasicBinaryOperatorSyntax("⊛")
));
}
public static FunctionTerm VectorSum(int dimension)
{
if (dimension < 0)
{
throw new ArgumentOutOfRangeException("dimension");
}
Variable x = new Variable(dimension, "x");
Variable y = new Variable(dimension, "y");
return(new FunctionDefinition
(
string.Format("vector_sum_{0}", dimension),
Vector
(
from index in Enumerable.Range(0, dimension)
select ApplySum(x.Select(index), y.Select(index))
)
.Abstract(x, y),
new BasicBinaryOperatorSyntax("⊕")
));
}
public void BeginMethod(string name, IrisType returnType, Variable[] parameters, Variable[] locals, bool entryPoint)
{
string cilName = string.Format(
"{0} {1}({2})",
IrisTypeToCilTypeName(returnType),
name,
string.Join(", ", parameters.Select(v => IrisVarToCilVar(v))));
WriteIndentedText(string.Format(".method public hidebysig static {0} cil managed", cilName));
WriteIndentedText("{");
_indentLevel++;
if (entryPoint)
{
WriteIndentedText(".entrypoint");
}
if (locals.Length > 0)
{
StringBuilder localsBuilder = new StringBuilder();
localsBuilder.Append(".locals init (");
int localIndex = 0;
foreach (Variable var in locals)
{
if (localIndex != 0)
localsBuilder.Append(", ");
localsBuilder.AppendFormat("[{0}] {1}", localIndex, IrisVarToCilVar(var));
localIndex++;
}
localsBuilder.Append(")");
WriteIndentedText(localsBuilder.ToString());
}
}
public double[] Differentiate(Variable[] vars, params double[] values)
{
MakeDifferentiation(vars);
return vars.Select(v => v.Derivative.Evaluate(values)).ToArray();
}
