Example usage for java.lang Float NaN

Introduction

In this page you can find the example usage for java.lang Float NaN.

Prototype

float NaN

To view the source code for java.lang Float NaN.

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Document

A constant holding a Not-a-Number (NaN) value of type float .

Usage

From source file:edu.harvard.iq.dataverse.util.SumStatCalculator.java

public static double[] calculateSummaryStatistics(Number[] x) {
    logger.fine("entering calculate summary statistics (" + x.length + " Number values);");

    double[] nx = new double[8];
    //("mean", "medn", "mode", "vald", "invd", "min", "max", "stdev");

    Float testNanValue = new Float(Float.NaN);
    Number testNumberValue = testNanValue;
    if (Double.isNaN(testNumberValue.doubleValue())) {
        logger.fine("Float test NaN value is still recognized as a Double NaN.");
    }/*from   w  w  w  .  ja  v  a 2 s .  com*/

    int invalid = countInvalidValues(x);
    nx[4] = invalid;
    logger.fine("counted invalid values: " + nx[4]);
    nx[3] = x.length - invalid;
    logger.fine("counted valid values: " + nx[3]);

    //double[] newx = prepareForSummaryStats(x);
    double[] newx = prepareForSummaryStatsAlternative(x, x.length - invalid);
    logger.fine("prepared double vector for summary stats calculation (" + newx.length + " double values);");

    ////nx[0] = StatUtils.mean(newx);
    nx[0] = calculateMean(newx);
    logger.fine("calculated mean: " + nx[0]);
    ////nx[1] = StatUtils.percentile(newx, 50);
    nx[1] = calculateMedian(newx);
    logger.fine("calculated medn: " + nx[1]);
    nx[2] = 0.0; //getMode(newx); 

    nx[5] = StatUtils.min(newx);
    logger.fine("calculated min: " + nx[5]);
    nx[6] = StatUtils.max(newx);
    logger.fine("calculated max: " + nx[6]);
    nx[7] = Math.sqrt(StatUtils.variance(newx));
    logger.fine("calculated stdev: " + nx[7]);
    return nx;
}

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From source file:org.evosuite.utils.NumberFormatter.java

/**
 * <p>/*from  ww  w  . j a v a2  s .  c  o m*/
 * getNumberString
 * </p>
 * 
 * @param value
 *            a {@link java.lang.Object} object.
 * @return a {@link java.lang.String} object.
 */
public static String getNumberString(Object value) {
    if (value == null)
        return "null";
    else if (value.getClass().equals(char.class) || value.getClass().equals(Character.class)) {
        // StringEscapeUtils fails to escape a single quote char
        if (Character.valueOf('\'').equals(value)) {
            return "'\\\''";
        } else {
            return "'" + StringEscapeUtils.escapeJava(Character.toString((Character) value)) + "'";
        }
    } else if (value.getClass().equals(String.class)) {
        return "\"" + StringEscapeUtils.escapeJava((String) value) + "\"";
    } else if (value.getClass().equals(float.class) || value.getClass().equals(Float.class)) {
        if (value.toString().equals("" + Float.NaN))
            return "Float.NaN";
        else if (value.toString().equals("" + Float.NEGATIVE_INFINITY))
            return "Float.NEGATIVE_INFINITY";
        else if (value.toString().equals("" + Float.POSITIVE_INFINITY))
            return "Float.POSITIVE_INFINITY";
        else if (((Float) value) < 0F)
            return "(" + value + "F)";
        else
            return value + "F";
    } else if (value.getClass().equals(double.class) || value.getClass().equals(Double.class)) {
        if (value.toString().equals("" + Double.NaN))
            return "Double.NaN";
        else if (value.toString().equals("" + Double.NEGATIVE_INFINITY))
            return "Double.NEGATIVE_INFINITY";
        else if (value.toString().equals("" + Double.POSITIVE_INFINITY))
            return "Double.POSITIVE_INFINITY";
        else if (((Double) value) < 0.0)
            return "(" + value + ")";
        else
            return value.toString();
    } else if (value.getClass().equals(long.class) || value.getClass().equals(Long.class)) {
        if (((Long) value) < 0)
            return "(" + value + "L)";
        else
            return value + "L";
    } else if (value.getClass().equals(byte.class) || value.getClass().equals(Byte.class)) {
        if (((Byte) value) < 0)
            return "(byte) (" + value + ")";
        else
            return "(byte)" + value;
    } else if (value.getClass().equals(short.class) || value.getClass().equals(Short.class)) {
        if (((Short) value) < 0)
            return "(short) (" + value + ")";
        else
            return "(short)" + value;
    } else if (value.getClass().equals(int.class) || value.getClass().equals(Integer.class)) {
        int val = ((Integer) value).intValue();
        if (val == Integer.MAX_VALUE)
            return "Integer.MAX_VALUE";
        else if (val == Integer.MIN_VALUE)
            return "Integer.MIN_VALUE";
        else if (((Integer) value) < 0)
            return "(" + value + ")";
        else
            return "" + val;
    } else if (value.getClass().isEnum() || value instanceof Enum) {
        // java.util.concurrent.TimeUnit is an example where the enum
        // elements are anonymous inner classes, and then isEnum does
        // not return true apparently? So we check using instanceof as well.

        Class<?> clazz = value.getClass();
        String className = clazz.getSimpleName();
        while (clazz.getEnclosingClass() != null) {
            String enclosingName = clazz.getEnclosingClass().getSimpleName();
            className = enclosingName + "." + className;
            clazz = clazz.getEnclosingClass();
        }

        // We have to do this here to avoid a double colon in the TimeUnit example
        if (!className.endsWith("."))
            className += ".";
        try {
            if (value.getClass().getField(value.toString()) != null)
                return className + value;
            else if (((Enum<?>) value).name() != null)
                return className + ((Enum<?>) value).name();
            else
                return "Enum.valueOf(" + className + "class, \"" + value + "\")";
        } catch (Exception e) {
            if (((Enum<?>) value).name() != null)
                return className + ((Enum<?>) value).name();
            else
                return "Enum.valueOf(" + className + "class /* " + e + " */, \"" + value + "\")";
            // return className + "valueOf(\"" + value + "\")";
        }
    } else if (value.getClass().equals(Boolean.class)) {
        return value.toString();
    } else {
        // This should not happen
        assert (false);
        return value.toString();
    }
}

---

From source file:edu.nyu.vida.data_polygamy.scalar_function.Mode.java

@Override
public float getResult() {
    if (count == 0)
        return Float.NaN;

    double[] primitiveValues = new double[floatValues.size()];
    for (int i = 0; i < floatValues.size(); i++)
        primitiveValues[i] = floatValues.get(i);

    return (float) StatUtils.mode(primitiveValues)[0];
}

---

From source file:edu.nyu.vida.data_polygamy.scalar_function.Median.java

@Override
public float getResult() {
    if (count == 0)
        return Float.NaN;

    double[] primitiveValues = new double[floatValues.size()];
    for (int i = 0; i < floatValues.size(); i++)
        primitiveValues[i] = floatValues.get(i);
    DescriptiveStatistics stats = new DescriptiveStatistics(primitiveValues);

    return (float) stats.getPercentile(50);
}

---

From source file:Main.java

/**
 * <p>Returns the maximum value in an array.</p>
 * // www  .j  a  v  a 2s  . co m
 * @param array  an array, must not be null or empty
 * @return the minimum value in the array
 * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
 * @throws IllegalArgumentException if <code>array</code> is empty
 * @see IEEE754rUtils#max(float[]) IEEE754rUtils for a version of this method that handles NaN differently
 */
public static float max(float[] array) {
    // Validates input
    if (array == null) {
        throw new IllegalArgumentException("The Array must not be null");
    } else if (array.length == 0) {
        throw new IllegalArgumentException("Array cannot be empty.");
    }

    // Finds and returns max
    float max = array[0];
    for (int j = 1; j < array.length; j++) {
        if (Float.isNaN(array[j])) {
            return Float.NaN;
        }
        if (array[j] > max) {
            max = array[j];
        }
    }

    return max;
}

---

From source file:Main.java

/**
 * <p>Returns the minimum value in an array.</p>
 * /*from w w  w. j av a 2  s . co m*/
 * @param array  an array, must not be null or empty
 * @return the minimum value in the array
 * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
 * @throws IllegalArgumentException if <code>array</code> is empty
 * @see IEEE754rUtils#min(float[]) IEEE754rUtils for a version of this method that handles NaN differently
 */
public static float min(float[] array) {
    // Validates input
    if (array == null) {
        throw new IllegalArgumentException("The Array must not be null");
    } else if (array.length == 0) {
        throw new IllegalArgumentException("Array cannot be empty.");
    }

    // Finds and returns min
    float min = array[0];
    for (int i = 1; i < array.length; i++) {
        if (Float.isNaN(array[i])) {
            return Float.NaN;
        }
        if (array[i] < min) {
            min = array[i];
        }
    }

    return min;
}

---

From source file:com.taobao.weex.utils.WXUtils.java

public static float getFloatByViewport(Object value, int viewport) {
    if (value == null) {
        return Float.NaN;
    }/*from   w  w w.  j av  a 2  s. co  m*/
    String temp = value.toString().trim();
    if (Constants.Name.AUTO.equals(temp) || Constants.Name.UNDEFINED.equals(temp) || TextUtils.isEmpty(temp)) {
        WXLogUtils.e("Argument Warning ! value is " + temp + "And default Value:" + Float.NaN);
        return Float.NaN;
    }

    if (temp.endsWith("wx")) {
        try {
            return transferWx(temp, viewport);
        } catch (NumberFormatException e) {
            WXLogUtils.e("Argument format error! value is " + value, e);
        } catch (Exception e) {
            WXLogUtils.e("Argument error! value is " + value, e);
        }
    } else if (temp.endsWith("px")) {
        try {
            temp = temp.substring(0, temp.indexOf("px"));
            return Float.parseFloat(temp);
        } catch (NumberFormatException nfe) {
            WXLogUtils.e("Argument format error! value is " + value, nfe);
        } catch (Exception e) {
            WXLogUtils.e("Argument error! value is " + value, e);
        }
    } else {
        try {
            return Float.parseFloat(temp);
        } catch (NumberFormatException nfe) {
            WXLogUtils.e("Argument format error! value is " + value, nfe);
        } catch (Exception e) {
            WXLogUtils.e("Argument error! value is " + value, e);
        }
    }
    return Float.NaN;
}

---

From source file:com.facebook.presto.operator.aggregation.AggregationTestUtils.java

public static void assertAggregation(InternalAggregationFunction function, Object expectedValue, Page page) {
    BiFunction<Object, Object, Boolean> equalAssertion;
    if (expectedValue instanceof Double && !expectedValue.equals(Double.NaN)) {
        equalAssertion = (actual, expected) -> Precision.equals((double) actual, (double) expected, 1e-10);
    } else if (expectedValue instanceof Float && !expectedValue.equals(Float.NaN)) {
        equalAssertion = (actual, expected) -> Precision.equals((float) actual, (float) expected, 1e-10f);
    } else {//w w  w .jav  a2s  . co m
        equalAssertion = Objects::equals;
    }

    assertAggregation(function, equalAssertion, null, page, expectedValue);
}

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From source file:com.frank.search.solr.repository.query.SolrParameter.java

/**
 * if method parameter has {@link Boost} use it
 * //from   w  w w . j  av a2s.c om
 * @return Float.NaN by default
 */
public float getBoost() {
    if (hasBoostAnnotation()) {
        return getBoostAnnotation().value();
    }
    return Float.NaN;
}

---

From source file:com.tmall.wireless.tangram3.util.Utils.java

public static float getImageRatio(String imageUrl) {
    if (TextUtils.isEmpty(imageUrl))
        return Float.NaN;

    try {/* ww  w. j av  a 2  s.c o  m*/
        Matcher matcher = REGEX_1.matcher(imageUrl);
        String widthStr;
        String heightStr;
        if (matcher.find()) {
            if (matcher.groupCount() >= 2) {
                widthStr = matcher.group(1);
                heightStr = matcher.group(2);
                if (widthStr.length() < 5 && heightStr.length() < 5) {
                    int urlWidth = Integer.parseInt(widthStr);
                    int urlHeight = Integer.parseInt(heightStr);

                    if (urlWidth == 0 || urlHeight == 0) {
                        return 1;
                    }
                    return (float) urlWidth / urlHeight;
                }
            }
        } else {
            matcher = REGEX_2.matcher(imageUrl);
            if (matcher.find()) {
                if (matcher.groupCount() >= 2) {
                    widthStr = matcher.group(1);
                    heightStr = matcher.group(2);
                    if (widthStr.length() < 5 && heightStr.length() < 5) {
                        int urlWidth = Integer.parseInt(widthStr);
                        int urlHeight = Integer.parseInt(heightStr);

                        if (urlWidth == 0 || urlHeight == 0) {
                            return 1;
                        }
                        return (float) urlWidth / urlHeight;
                    }
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return Float.NaN;
}

---

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