예제 #1
0
  /** Executes some calculations to support a dynamic axis labeling for a linear scale. */
  private void prepareLinAxis() {
    // range as driving force for following calculations, no matter if INT
    // or DBL ... whatsoever
    double range = Math.abs(max - min);
    if (range == 0) return;

    // small ranges between min and max value
    if (range < 1) {
      final double dec = 1.0d / range;
      double pow = (int) (Math.floor(Math.log10(dec) + .5d) + 1) * 2;
      final double fac = (int) Math.pow(10, pow);
      final double tmin = min * fac;
      final double tmax = max * fac;
      range = Math.abs(tmax - tmin);

      pow = range < 10 ? 0 : (int) Math.floor(Math.log10(range) + .5d) - 1;
      calculatedCaptionStep = (int) Math.pow(10, pow);
      calculatedCaptionStep /= fac;
      return;
    }

    final int pow = range < 10 ? 0 : (int) Math.floor(Math.log10(range) + .5d) - 1;
    calculatedCaptionStep = (int) Math.pow(10, pow);
  }
예제 #2
0
  /**
   * Calculates axis caption depending on view width / height.
   *
   * @param space space of view axis available for captions
   */
  void calcCaption(final int space) {
    if (type == Kind.DBL || type == Kind.INT) {
      final double range = Math.abs(max - min);
      if (range == 0) {
        nrCaptions = 1;
        return;
      }

      // labeling for logarithmic scale
      if (log) {
        startvalue = min;
        nrCaptions = 3;
        return;
      }

      // labeling for linear scale
      final boolean dbl = type == Kind.DBL;
      actlCaptionStep = calculatedCaptionStep;
      nrCaptions = (int) (range / actlCaptionStep) + 1;
      while (2 * nrCaptions * PlotView.CAPTIONWHITESPACE * 3 < space
          && (dbl || actlCaptionStep % 2 == 0)) {
        actlCaptionStep /= 2;
        nrCaptions = (int) (range / actlCaptionStep);
      }
      while (nrCaptions * PlotView.CAPTIONWHITESPACE * 3 > space) {
        actlCaptionStep *= 2;
        nrCaptions = (int) (range / actlCaptionStep);
      }
      // calculate first value to be drawn
      startvalue = min + actlCaptionStep - min % actlCaptionStep;
      if (startvalue - min < actlCaptionStep / 4) startvalue += actlCaptionStep;

      // type == TEXT / CAT
    } else {
      nrCaptions = space / (PlotView.CAPTIONWHITESPACE * 3);
      if (nrCaptions > nrCats) nrCaptions = nrCats;
      actlCaptionStep = 1.0d / (nrCaptions - 1);
    }
  }
예제 #3
0
 /**
  * Calculates base e logarithm for the given value.
  *
  * @param d value
  * @return base e logarithm for d
  */
 private double ln(final double d) {
   return d == 0 ? 0 : Math.log1p(Math.abs(d));
 }
예제 #4
0
  /**
   * Formats the specified number and returns a string representation.
   *
   * @param item item
   * @param pics pictures
   * @param ii input info
   * @return picture variables
   * @throws QueryException query exception
   */
  private byte[] format(final ANum item, final Picture[] pics, final InputInfo ii)
      throws QueryException {

    // Rule 1: return results for NaN
    final double d = item.dbl(ii);
    if (Double.isNaN(d)) return nan;

    // Rule 2: check if value if negative (smaller than zero or -0)
    final boolean neg = d < 0 || d == 0 && Double.doubleToLongBits(d) == Long.MIN_VALUE;
    final Picture pic = pics[neg && pics.length == 2 ? 1 : 0];
    final IntList res = new IntList(), intgr = new IntList(), fract = new IntList();
    int exp = 0;

    // Rule 3: percent/permille
    ANum num = item;
    if (pic.pc) num = (ANum) Calc.MULT.ev(num, Int.get(100), ii);
    if (pic.pm) num = (ANum) Calc.MULT.ev(num, Int.get(1000), ii);

    if (Double.isInfinite(num.dbl(ii))) {
      // Rule 4: infinity
      intgr.add(new TokenParser(inf).toArray());
    } else {
      // Rule 5: exponent
      if (pic.minExp != 0 && d != 0) {
        BigDecimal dec = num.dec(ii).abs().stripTrailingZeros();
        int scl = 0;
        if (dec.compareTo(BigDecimal.ONE) >= 0) {
          scl = dec.setScale(0, RoundingMode.HALF_DOWN).precision();
        } else {
          while (dec.compareTo(BigDecimal.ONE) < 0) {
            dec = dec.multiply(BigDecimal.TEN);
            scl--;
          }
          scl++;
        }
        exp = scl - pic.min[0];
        if (exp != 0) {
          final BigDecimal n = BigDecimal.TEN.pow(Math.abs(exp));
          num = (ANum) Calc.MULT.ev(num, Dec.get(exp > 0 ? BigDecimal.ONE.divide(n) : n), ii);
        }
      }
      num = num.round(pic.maxFrac, true).abs();

      // convert positive number to string
      final String s =
          (num instanceof Dbl || num instanceof Flt
                  ? Dec.get(BigDecimal.valueOf(num.dbl(ii)))
                  : num)
              .toString();

      // integer/fractional separator
      final int sep = s.indexOf('.');

      // create integer part
      final int sl = s.length();
      final int il = sep == -1 ? sl : sep;
      for (int i = il; i < pic.min[0]; ++i) intgr.add(zero);
      // fractional number: skip leading 0
      if (!s.startsWith("0.") || pic.min[0] > 0) {
        for (int i = 0; i < il; i++) intgr.add(zero + s.charAt(i) - '0');
      }

      // squeeze in grouping separators
      if (pic.group[0].length == 1 && pic.group[0][0] > 0) {
        // regular pattern with repeating separators
        for (int p = intgr.size() - (neg ? 2 : 1); p > 0; --p) {
          if (p % pic.group[0][0] == 0) intgr.insert(intgr.size() - p, grouping);
        }
      } else {
        // irregular pattern, or no separators at all
        final int gl = pic.group[0].length;
        for (int g = 0; g < gl; ++g) {
          final int pos = intgr.size() - pic.group[0][g];
          if (pos > 0) intgr.insert(pos, grouping);
        }
      }

      // create fractional part
      final int fl = sep == -1 ? 0 : sl - il - 1;
      if (fl != 0) for (int i = sep + 1; i < sl; i++) fract.add(zero + s.charAt(i) - '0');
      for (int i = fl; i < pic.min[1]; ++i) fract.add(zero);

      // squeeze in grouping separators in a reverse manner
      final int ul = fract.size();
      for (int p = pic.group[1].length - 1; p >= 0; p--) {
        final int pos = pic.group[1][p];
        if (pos < ul) fract.insert(pos, grouping);
      }
    }

    // add minus sign
    if (neg && pics.length != 2) res.add(minus);
    // add prefix and integer part
    res.add(pic.prefSuf[0].toArray()).add(intgr.finish());
    // add fractional part
    if (!fract.isEmpty()) res.add(decimal).add(fract.finish());
    // add exponent
    if (pic.minExp != 0) {
      res.add(exponent);
      if (exp < 0) res.add(minus);
      final String s = Integer.toString(Math.abs(exp));
      final int sl = s.length();
      for (int i = sl; i < pic.minExp; i++) res.add(zero);
      for (int i = 0; i < sl; i++) res.add(zero + s.charAt(i) - '0');
    }
    // add suffix
    res.add(pic.prefSuf[1].toArray());
    return new TokenBuilder(res.finish()).finish();
  }