List of usage examples for java.lang Math pow
@HotSpotIntrinsicCandidate public static double pow(double a, double b)
From source file:com.itemanalysis.psychometrics.mixture.MvNormalComponentDistribution.java
/** * * @param x a matrix of dimension 1 x k, where k is the number of variables * @return/*from w w w . j ava 2 s . c o m*/ */ public double density(RealMatrix x) throws SingularMatrixException { double prob = 0.0; RealMatrix xTran = x.transpose(); int d = xTran.getRowDimension(); double det = new LUDecomposition(sigma).getDeterminant(); double nconst = 1.0 / Math.sqrt(det * Math.pow(2.0 * Math.PI, d)); RealMatrix Sinv = new LUDecomposition(sigma).getSolver().getInverse(); RealMatrix delta = xTran.subtract(mu); RealMatrix dist = (delta.transpose().multiply(Sinv).multiply(delta)); prob = nconst * Math.exp(-0.5 * dist.getEntry(0, 0)); return prob; }
From source file:com.davidbracewell.math.distribution.NormalDistribution.java
/** * Default Constructor//ww w . j a v a2 s . com * * @param mean The mean of the distribution * @param stddev The standard deviation of the distribution */ public NormalDistribution(double mean, double stddev) { super(0d); this.mean = mean; this.stddev = stddev; this.var = Math.pow(stddev, 2); }
From source file:com.github.lynxdb.server.core.aggregators.Dev.java
@Override public TimeSerie aggregate(List<TimeSerie> _series) { return doInterpolate(_series, new Reducer() { double sum; double sumSquares; double count; @Override/*from ww w .jav a 2s. c o m*/ public void update(Entry _entry) { sum += _entry.getValue(); sumSquares += Math.pow(_entry.getValue(), 2); count++; } @Override public double result() { //divisor is (count -1) because of Bessel's correction return (count < 2) ? 0.0 : Math.sqrt((sumSquares / (count - 1)) - (Math.pow(sum, 2) / (count - 1))); } @Override public void reset() { sum = 0; count = 0; sumSquares = 0; } }); }
From source file:com.swcguild.springmvcwebapp.controller.InterCalcController.java
@RequestMapping(value = "/intercalc", method = RequestMethod.POST) public String doPost(HttpServletRequest request, Model model) { try {/*from ww w. j ava 2s. c om*/ originalBalance = Double.parseDouble(request.getParameter("myAnswer")); startingBalance = originalBalance; intRate = Double.parseDouble(request.getParameter("myRate")); numYears = Double.parseDouble(request.getParameter("myYears")); numPeriods = Double.parseDouble(request.getParameter("myPeriods")); message = ""; //totalInterest; //newBalance; //List<Map> annualInterest = new ArrayList<>(); Map yearMap = new HashMap<>(); DecimalFormat df = new DecimalFormat("#.00"); int yearCount = 0; do { newBalance = originalBalance * (Math.pow(1 + ((intRate * .01) / numPeriods), (numPeriods))); yearCount++; double interestPerYear = newBalance - originalBalance; String interestPerYearString = df.format(interestPerYear); yearMap.put(yearCount, interestPerYearString); originalBalance = newBalance; } while (yearCount <= (numYears - 1)); totalInterest = newBalance - startingBalance; //annualInterest.add(yearMap); String annualInterestString = yearMap.toString().replace("{", "").replace("}", "").trim(); model.addAttribute("originalBalance", df.format(startingBalance)); model.addAttribute("newBalance", df.format(newBalance)); model.addAttribute("interestRate", intRate); model.addAttribute("interestEarned", df.format(totalInterest)); model.addAttribute("years", df.format(numYears)); model.addAttribute("periods", df.format(numPeriods)); model.addAttribute("annualInterest", yearMap); } catch (NumberFormatException e) { } return "intercalcResponse"; //<td><c:out value="${current.id}" /><td> }
From source file:de.termininistic.serein.examples.benchmarks.functions.unimodal.PermFunction.java
@Override public double map(RealVector v) { double sum = 0.0; double[] x = v.toArray(); for (int i = 0; i < x.length; i++) { double innerSum = 0.0; for (int j = 0; j < x.length; j++) { innerSum += (j + 1 + beta) * (Math.pow(x[j], i + 1) - 1 / Math.pow(j + 1, i + 1)); }/* www. j av a 2 s . c o m*/ sum += innerSum * innerSum; } return sum; }
From source file:math2605.gn_exp.java
private static void setR(List<String[]> pairs, double a, double b, double c, RealMatrix r) { int row = 0;/*from w w w . ja va2 s. c om*/ for (String[] p : pairs) { double x = Double.parseDouble(p[0]); double fx = a * Math.pow(Math.E, b * x) + c; double y = Double.parseDouble(p[1]); double resid = y - fx; r.setEntry(row, 0, resid); row++; } }
From source file:com.opengamma.analytics.financial.model.volatility.surface.ConstantElasticityOfVarianceBlackEquivalentVolatilitySurfaceModel.java
@Override public VolatilitySurface getSurface(final Map<OptionDefinition, Double> optionData, final ConstantElasticityOfVarianceModelDataBundle data) { Validate.notNull(optionData, "option data"); ArgumentChecker.notEmpty(optionData, "option data"); Validate.notNull(data, "data"); if (optionData.size() > 1) { s_logger.warn("Have more than one option: only using the first"); }//from w w w . jav a2s . c o m final OptionDefinition option = optionData.keySet().iterator().next(); final double k = option.getStrike(); final double t = option.getTimeToExpiry(data.getDate()); final double sigma = data.getVolatility(t, k); final double beta = data.getElasticity(); final double forward = data.getSpot(); final double f = 0.5 * (forward + k); final double beta1 = 1 - beta; final double sigmaAdjusted = sigma * (1 + beta1 * (2 + beta) * (f - k) * (f - k) / 24 / f / f + beta1 * beta1 * sigma * sigma * t / 24 / Math.pow(f, 2 * beta1)) / Math.pow(f, beta1); return new VolatilitySurface(ConstantDoublesSurface.from(sigmaAdjusted)); }
From source file:Callers.BiasedBinomialCaller.java
/** * Calls a genotype based on reads// ww w . jav a 2s . com * @param d The reads * @return The called genotype */ public double[] callSingle(int[] d) { if ((d[0] + d[1]) != 0) { double[] probs = new double[3]; double l0 = Math.pow(1 - error, d[0]) * Math.pow(error, d[1]); double l1 = Math.pow(bias, d[0]) * Math.pow(1 - bias, d[1]); double l2 = Math.pow(error, d[0]) * Math.pow(1 - error, d[1]); double totall = l0 + l1 + l2; probs[0] = l0 / totall; probs[1] = l1 / totall; probs[2] = l2 / totall; return probs; } else { double[] probs = { 1.0 / 3.0, 1.0 / 3.0, 1.0 / 3.0 }; return probs; } }
From source file:math2605.gn_qua.java
private static void setR(List<String[]> pairs, double a, double b, double c, RealMatrix r) { int row = 0;/* w ww . j a v a2 s.co m*/ for (String[] p : pairs) { double x = Double.parseDouble(p[0]); double fx = a * Math.pow(x, 2) + b * x + c; double y = Double.parseDouble(p[1]); double resid = y - fx; r.setEntry(row, 0, resid); row++; } }
From source file:ardufocuser.starfocusing.Utils.java
/** * Calcula la distancia euclidea de dos puntos, dado sus coordenadas. *//* w ww.ja v a 2 s. c o m*/ public static double computeDistance(int p1x, int p1y, int p2x, int p2y) { int cat1 = Math.abs(p1x - p2x); int cat2 = Math.abs(p1y - p2y); double dis = Math.sqrt((Math.pow(cat1, 2) + Math.pow(cat2, 2))); return dis; }