コード例 #1
0
ファイル: SliderBlock.java プロジェクト: gpbonillas/viskell
 private double computeCurrentValue() {
   double offset = this.slider.getValue();
   if (this.isIntegral) {
     return Math.rint(this.baseValue + Math.signum(offset) * 4 * Math.expm1(Math.abs(offset) * 4));
   } else {
     return this.baseValue + Math.signum(offset) * Math.expm1(Math.abs(offset) * 5);
   }
 }
コード例 #2
0
  /**
   * This is the Taylor expansion of the first derivative of $$\frac{\exp(x)-1}{x}$$
   *
   * @param x value
   * @return result
   */
  public static double epsilonP(final double x) {

    if (Math.abs(x) > 1e-7) {
      return ((x - 1) * Math.expm1(x) + x) / x / x;
    }
    return taylor(x, COEFF2);
  }
コード例 #3
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 /** {@inheritDoc} */
 public OpenMapRealVector mapExpm1ToSelf() {
   Iterator iter = entries.iterator();
   while (iter.hasNext()) {
     iter.advance();
     entries.put(iter.key(), Math.expm1(iter.value()));
   }
   return this;
 }
コード例 #4
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  /**
   * This is the Taylor expansion of the second derivative of $$\frac{\exp(x)-1}{x}$$
   *
   * @param x value
   * @return result
   */
  public static double epsilonPP(final double x) {

    if (Math.abs(x) > 1e-5) {
      final double x2 = x * x;
      final double x3 = x * x2;
      return (Math.expm1(x) * (x2 - 2 * x + 2) + x2 - 2 * x) / x3;
    }
    return taylor(x, COEFF3);
  }
コード例 #5
0
ファイル: Queen8.java プロジェクト: Coding-Le/eight-queen
  public int simulateAneal() {
    double[] schedule = new double[25000];
    int sum = 0;
    int conflict;
    for (int i = 0; i < schedule.length; i++) {
      schedule[i] = 35 - (35.0 / 25000.0) * (i + 1);

      conflict = h(queen);
      double T = schedule[i];

      if (T == 0) {
        if (conflict != 0) {

          sum = -(i + 1);
        } else {

          sum = i + 1;
        }

        break;
      }

      if (conflict == 0) {

        sum = i + 1;
        break;
      }

      Queen[] newTemp = new Queen[8];
      for (int a = 0; a < 8; a++) {
        newTemp[a] = new Queen(queen[a].x, queen[a].y);
      }
      Queen[] newQueens = randomGetStates(newTemp);

      int E = h(queen) - h(newQueens);
      if (E > 0) {
        this.queen = newQueens;
      } else {
        double value = E / (double) T;
        double posibility = Math.expm1(value) + 1.0;
        if (Math.random() < posibility) {
          this.queen = newQueens;
        }
      }
    }
    return sum;
  }
コード例 #6
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 public double getCRB() {
   double p = h / var;
   AllPAMSymbolGenerator gen = new AllPAMSymbolGenerator();
   double bestcrb = Double.NEGATIVE_INFINITY;
   double[] d = new double[T];
   for (int i = 0; i < Math.pow(M, T); i++) {
     double[] nextsym = gen.getNext();
     // System.out.println(nextsym.length);
     for (int j = 0; j < T; j++) {
       d[j] = x[j] - nextsym[j];
     }
     double magd2 = VectorFunctions.sum2(d);
     if (magd2 > 0.5) {
       double std = VectorFunctions.dot(x, d);
       double crb = var / (magx2 - p * std * std / Math.expm1(p * magd2));
       if (crb > bestcrb) bestcrb = crb;
     }
   }
   return bestcrb;
 }
コード例 #7
0
ファイル: SignRank.java プロジェクト: beattyk1/renjin
 public static double R_Log1_Exp(double x, boolean lower_tail, boolean log_p) {
   return ((x) > -Math.log(2.0) ? Math.log(-Math.expm1(x)) : Math.log1p(-Math.exp(x)));
 }
コード例 #8
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  @Override
  public Object visit(RealUnaryExpression n, Void arg) {
    Double doubleObject = (Double) n.getOperand().accept(this, null);
    double doubleVal = doubleObject.doubleValue();

    Operator op = n.getOperator();
    switch (op) {
      case ABS:
        return Math.abs(doubleVal);
      case ACOS:
        return Math.acos(doubleVal);
      case ASIN:
        return Math.asin(doubleVal);
      case ATAN:
        return Math.atan(doubleVal);
      case CBRT:
        return Math.cbrt(doubleVal);
      case CEIL:
        return Math.ceil(doubleVal);
      case COS:
        return Math.cos(doubleVal);
      case COSH:
        return Math.cosh(doubleVal);
      case EXP:
        return Math.exp(doubleVal);
      case EXPM1:
        return Math.expm1(doubleVal);
      case FLOOR:
        return Math.floor(doubleVal);
      case LOG:
        return Math.log(doubleVal);
      case LOG10:
        return Math.log10(doubleVal);
      case LOG1P:
        return Math.log1p(doubleVal);
      case NEG:
        return -doubleVal;
      case NEXTUP:
        return Math.nextUp(doubleVal);
      case RINT:
        return Math.rint(doubleVal);
      case SIGNUM:
        return Math.signum(doubleVal);
      case SIN:
        return Math.sin(doubleVal);
      case SINH:
        return Math.sinh(doubleVal);
      case SQRT:
        return Math.sqrt(doubleVal);
      case TAN:
        return Math.tan(doubleVal);
      case TANH:
        return Math.tanh(doubleVal);
      case TODEGREES:
        return Math.toDegrees(doubleVal);
      case TORADIANS:
        return Math.toRadians(doubleVal);
      case ULP:
        return Math.ulp(doubleVal);

      default:
        log.warn("RealUnaryExpression: unimplemented operator: " + op);
        return null;
    }
  }
コード例 #9
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 // To add/remove functions change evaluateOperator() and registration
 public double evaluateFunction(String fncnam, ArgParser fncargs) throws ArithmeticException {
   switch (Character.toLowerCase(fncnam.charAt(0))) {
     case 'a':
       {
         if (fncnam.equalsIgnoreCase("abs")) {
           return Math.abs(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("acos")) {
           return Math.acos(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("asin")) {
           return Math.asin(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("atan")) {
           return Math.atan(fncargs.next());
         }
       }
       break;
     case 'c':
       {
         if (fncnam.equalsIgnoreCase("cbrt")) {
           return Math.cbrt(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("ceil")) {
           return Math.ceil(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("cos")) {
           return Math.cos(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("cosh")) {
           return Math.cosh(fncargs.next());
         }
       }
       break;
     case 'e':
       {
         if (fncnam.equalsIgnoreCase("exp")) {
           return Math.exp(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("expm1")) {
           return Math.expm1(fncargs.next());
         }
       }
       break;
     case 'f':
       {
         if (fncnam.equalsIgnoreCase("floor")) {
           return Math.floor(fncargs.next());
         }
       }
       break;
     case 'g':
       {
         //              if(fncnam.equalsIgnoreCase("getExponent"   )) { return
         // Math.getExponent(fncargs.next());                } needs Java 6
       }
       break;
     case 'l':
       {
         if (fncnam.equalsIgnoreCase("log")) {
           return Math.log(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("log10")) {
           return Math.log10(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("log1p")) {
           return Math.log1p(fncargs.next());
         }
       }
       break;
     case 'm':
       {
         if (fncnam.equalsIgnoreCase("max")) {
           return Math.max(fncargs.next(), fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("min")) {
           return Math.min(fncargs.next(), fncargs.next());
         }
       }
       break;
     case 'n':
       {
         //              if(fncnam.equalsIgnoreCase("nextUp"        )) { return Math.nextUp
         // (fncargs.next());                } needs Java 6
       }
       break;
     case 'r':
       {
         if (fncnam.equalsIgnoreCase("random")) {
           return Math.random();
         } // impure
         if (fncnam.equalsIgnoreCase("round")) {
           return Math.round(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("roundHE")) {
           return Math.rint(fncargs.next());
         } // round half-even
       }
       break;
     case 's':
       {
         if (fncnam.equalsIgnoreCase("signum")) {
           return Math.signum(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("sin")) {
           return Math.sin(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("sinh")) {
           return Math.sinh(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("sqrt")) {
           return Math.sqrt(fncargs.next());
         }
       }
       break;
     case 't':
       {
         if (fncnam.equalsIgnoreCase("tan")) {
           return Math.tan(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("tanh")) {
           return Math.tanh(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("toDegrees")) {
           return Math.toDegrees(fncargs.next());
         }
         if (fncnam.equalsIgnoreCase("toRadians")) {
           return Math.toRadians(fncargs.next());
         }
       }
       break;
     case 'u':
       {
         if (fncnam.equalsIgnoreCase("ulp")) {
           return Math.ulp(fncargs.next());
         }
       }
       break;
       // no default
   }
   throw new UnsupportedOperationException(
       "MathEval internal function setup is incorrect - internal function \""
           + fncnam
           + "\" not handled");
 }
コード例 #10
0
ファイル: AstExpm1.java プロジェクト: h2oai/h2o-3
 @Override
 public double op(double d) {
   return Math.expm1(d);
 }
コード例 #11
0
 /**
  * This is the Taylor expansion of $$\frac{\exp(x)-1}{x}$$ - note for $$|x| > 10^{-10}$$ the
  * expansion is note used
  *
  * @param x value
  * @return result
  */
 public static double epsilon(final double x) {
   if (Math.abs(x) > 1e-10) {
     return Math.expm1(x) / x;
   }
   return taylor(x, COEFF1);
 }