Uses of Class
dev.nm.analysis.function.rn2r1.AbstractRealScalarFunction
Packages that use AbstractRealScalarFunction
Package
Description
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Uses of AbstractRealScalarFunction in dev.nm.analysis.curvefit.interpolation
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.curvefit.interpolationModifier and TypeClassDescriptionclass
Define a univariate function by linearly interpolating between adjacent points.class
Neville's algorithm is a polynomial interpolation algorithm. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.differentiation
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.differentiationModifier and TypeClassDescriptionclass
Ridders' method computes the numerical derivative of a function. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.differentiation.multivariate
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.differentiation.multivariateModifier and TypeClassDescriptionclass
A partial derivative of a multivariate function is the derivative with respect to one of the variables with the others held constant. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.differentiation.univariate
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.differentiation.univariateModifier and TypeClassDescriptionclass
This is the first order derivative function of theBeta
function w.r.t x, \({\partial \over \partial x} \mathrm{B}(x, y)\).class
This is the first order derivative function of the Regularized Incomplete Beta function,BetaRegularized
, w.r.t the upper limit, x.class
This is the first order derivative function of the Error function,Erf
.class
The first derivative is a measure of how a function changes as its input changes.class
This is the first order derivative function of the Gamma function, \({d \mathrm{\Gamma}(x) \over dx}\).class
This is the first order derivative function of aGaussian
function, \({d \mathrm{\phi}(x) \over dx}\).class
This is the first order derivative function of aPolynomial
, which, again, is a polynomial.class
A finite difference (divided by a small increment) is an approximation of the derivative of a function. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.polynomial
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.polynomialModifier and TypeClassDescriptionclass
The Cauchy's polynomial of a polynomial takes this form:class
A polynomial is aUnivariateRealFunction
that represents a finite length expression constructed from variables and constants, using the operations of addition, subtraction, multiplication, and constant non-negative whole number exponents.class
A quadratic monomial has this form: x2 + ux + v.class
This constructs a scaled polynomial that has neither too big or too small coefficients, hence avoiding overflow or underflow. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.rn2r1
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.rn2r1Modifier and TypeClassDescriptionclass
A bivariate real function takes two real arguments and outputs one real value.class
A trivariate real function takes three real arguments and outputs one real value.class
A quadratic function takes this form: \(f(x) = \frac{1}{2} \times x'Hx + x'p + c\).class
Projection creates a real-valued functionRealScalarFunction
from a vector-valued functionRealVectorFunction
by taking only one of its coordinate components in the vector output. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.rn2r1.univariate
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.rn2r1.univariateModifier and TypeClassDescriptionclass
A univariate real function takes one real argument and outputs one real value.class
A continued fraction representation of a number has this form: \[ z = b_0 + \cfrac{a_1}{b_1 + \cfrac{a_2}{b_2 + \cfrac{a_3}{b_3 + \cfrac{a_4}{b_4 + \ddots\,}}}} \] ai and bi can be functions of x, which in turn makes z a function of x.class
A step function (or staircase function) is a finite linear combination of indicator functions of intervals. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.special
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.specialModifier and TypeClassDescriptionclass
The Rastrigin function is a non-convex function used as a performance test problem for optimization algorithms. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.special.beta
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.special.betaModifier and TypeClassDescriptionclass
The beta function defined as: \[ B(x,y) = \frac{\Gamma(x)\Gamma(y)}{\Gamma(x+y)}= \int_0^1t^{x-1}(1-t)^{y-1}\,dt, x > 0, y > 0 \]class
The Regularized Incomplete Beta function is defined as: \[ I_x(p,q) = \frac{B(x;\,p,q)}{B(p,q)} = \frac{1}{B(p,q)} \int_0^x t^{p-1}\,(1-t)^{q-1}\,dt, p > 0, q > 0 \]class
The inverse of the Regularized Incomplete Beta function is defined at: \[ x = I^{-1}_{(p,q)}(u), 0 \le u \le 1 \]class
This class represents the log of Beta functionlog(B(x, y))
.class
A multinomial Beta function is defined as: \[ \frac{\prod_{i=1}^K \Gamma(\alpha_i)}{\Gamma\left(\sum_{i=1}^K \alpha_i\right)},\qquad\boldsymbol{\alpha}=(\alpha_1,\cdots,\alpha_K) \] -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.special.gamma
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.special.gammaModifier and TypeClassDescriptionclass
The digamma function is defined as the logarithmic derivative of the gamma function.class
The Gergo Nemes' algorithm is very simple and quick to compute the Gamma function, if accuracy is not critical.class
Lanczos approximation provides a way to compute the Gamma function such that the accuracy can be made arbitrarily precise.class
Lanczos approximation, computations are done indouble
.class
The Lower Incomplete Gamma function is defined as: \[ \gamma(s,x) = \int_0^x t^{s-1}\,e^{-t}\,{\rm d}t = P(s,x)\Gamma(s) \] P(s,x) is the Regularized Incomplete Gamma P function.class
The Regularized Incomplete Gamma P function is defined as: \[ P(s,x) = \frac{\gamma(s,x)}{\Gamma(s)} = 1 - Q(s,x), s \geq 0, x \geq 0 \]class
The inverse of the Regularized Incomplete Gamma P function is defined as: \[ x = P^{-1}(s,u), 0 \geq u \geq 1 \] Whens > 1
, we use the asymptotic inversion method. Whens <= 1
, we use an approximation of P(s,x) together with a higher-order Newton like method. In both cases, the estimated value is then improved using Halley's method, c.f.,HalleyRoot
.class
The Regularized Incomplete Gamma Q function is defined as: \[ Q(s,x)=\frac{\Gamma(s,x)}{\Gamma(s)}=1-P(s,x), s \geq 0, x \geq 0 \] The algorithm used for computing the regularized incomplete Gamma Q function depends on the values of s and x.class
The Upper Incomplete Gamma function is defined as: \[ \Gamma(s,x) = \int_x^{\infty} t^{s-1}\,e^{-t}\,{\rm d}t = Q(s,x) \times \Gamma(s) \] The integrand has the same form as the Gamma function, but the lower limit of the integration is a variable.class
The log-Gamma function, \(\log (\Gamma(z))\), for positive real numbers, is the log of the Gamma function.class
The trigamma function is defined as the logarithmic derivative of the digamma function. -
Uses of AbstractRealScalarFunction in dev.nm.analysis.function.special.gaussian
Subclasses of AbstractRealScalarFunction in dev.nm.analysis.function.special.gaussianModifier and TypeClassDescriptionclass
Hastings algorithm is faster but less accurate way to compute the cumulative standard Normal.class
The inverse of the cumulative standard Normal distribution function is defined as: \[ N^{-1}(u) /]class
Marsaglia is about 3 times slower but is more accurate to compute the cumulative standard Normal.class
The Error function is defined as: \[ \operatorname{erf}(x) = \frac{2}{\sqrt{\pi}}\int_{0}^x e^{-t^2} dt \]class
This complementary Error function is defined as: \[ \operatorname{erfc}(x) = 1-\operatorname{erf}(x) = \frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2}\,dt \]class
The inverse of the Error function is defined as: \[ \operatorname{erf}^{-1}(x) \]class
The Gaussian function is defined as: \[ f(x) = a e^{- { \frac{(x-b)^2 }{ 2 c^2} } } \] -
Uses of AbstractRealScalarFunction in dev.nm.solver.multivariate.constrained.convex.sdp.socp.qp.problem
Subclasses of AbstractRealScalarFunction in dev.nm.solver.multivariate.constrained.convex.sdp.socp.qp.problemModifier and TypeClassDescriptionclass
A quadratic programming problem with only equality constraints can be converted into a equivalent quadratic programming problem without constraints, hence a mere quadratic function. -
Uses of AbstractRealScalarFunction in dev.nm.stat.evt.evd.univariate.fitting.acer
Subclasses of AbstractRealScalarFunction in dev.nm.stat.evt.evd.univariate.fitting.acerModifier and TypeClassDescriptionclass
The ACER (Average Conditional Exceedance Rate) function \(\epsilon_k(\eta)\) approximates the probability \[ \epsilon_k(\eta) = Pr(X_k > \eta | X_1 \le \eta, X_2 \le \eta, ..., X_{k-1} \le \eta) \] for a sequence of stochastic process observations \(X_i\) with a k-step memory.class
The inverse of the ACER function.class
The ACER function in log scale (base e), i.e., \(log(\epsilon_k(\eta))\).class
Given an ACER function, compute the return level \(\eta\) for a given return period \(R\). -
Uses of AbstractRealScalarFunction in dev.nm.stat.evt.function
Subclasses of AbstractRealScalarFunction in dev.nm.stat.evt.functionModifier and TypeClassDescriptionclass
Given a GEV distribution of a random variable \(X\), the return level \(\eta\) is the value that is expected to be exceeded on average once every interval of time \(T\), with a probability of \(1 / T\).class
The return period \(R\) of a level \(\eta\) for a random variable \(X\) is the mean number of trials that must be done for \(X\) to exceed \(\eta\). -
Uses of AbstractRealScalarFunction in dev.nm.stat.stochasticprocess.univariate.filtration
Modifier and TypeClassDescriptionclass
This is aFiltrationFunction
that returns \(B(t_i)\), the Brownian motion value at the i-th time point.class
This represents a function of this integral \[ I = \int_{0}^{1} B(t)dt \]class
This represents a function of this integral \[ \int_{0}^{1} (t - 0.5) * B(t) dt \]class
A filtration function, parameterized by a fixed filtration, is a function of time, \(f(\mathfrak{F_{t_i}})\). -
Uses of AbstractRealScalarFunction in dev.nm.stat.timeseries.linear.univariate
Subclasses of AbstractRealScalarFunction in dev.nm.stat.timeseries.linear.univariateModifier and TypeClassDescriptionclass
This is the auto-correlation function of a univariate time series {xt}.class
This is the auto-covariance function of a univariate time series {xt}. -
Uses of AbstractRealScalarFunction in dev.nm.stat.timeseries.linear.univariate.sample
Modifier and TypeClassDescriptionclass
This is the sample Auto-Correlation Function (ACF) for a univariate data set.class
This is the sample Auto-Covariance Function (ACVF) for a univariate data set.class
This is the sample partial Auto-Correlation Function (PACF) for a univariate data set. -
Uses of AbstractRealScalarFunction in dev.nm.stat.timeseries.linear.univariate.stationaryprocess.arma
Subclasses of AbstractRealScalarFunction in dev.nm.stat.timeseries.linear.univariate.stationaryprocess.armaModifier and TypeClassDescriptionclass
Compute the Auto-Correlation Function (ACF) for an AutoRegressive Moving Average (ARMA) model, assuming that EXt = 0.class
Computes the Auto-CoVariance Function (ACVF) for an AutoRegressive Moving Average (ARMA) model by recursion. -
Uses of AbstractRealScalarFunction in tech.nmfin.portfoliooptimization.lai2010.ceta
Subclasses of AbstractRealScalarFunction in tech.nmfin.portfoliooptimization.lai2010.ceta -
Uses of AbstractRealScalarFunction in tech.nmfin.portfoliooptimization.lai2010.ceta.maximizer