@Test
public void readList1() throws Exception {
String inputText = "10\n" + "8\n" + "6\n" + "4\n" + "2\n" + "0\n";
VType value = TextIO.readList(new StringReader(inputText));
assertThat(value, instanceOf(VNumberArray.class));
VNumberArray array = (VNumberArray) value;
assertThat(array.getData(), equalTo((ListNumber) new ArrayDouble(10, 8, 6, 4, 2, 0)));
}
/**
* Format just the value of a {@link VType} into a buffer (not timestamp, ..)
*
* @param value Value
* @param buf {@link StringBuilder}
* @return {@link StringBuilder}
*/
public StringBuilder format(final VType value, final StringBuilder buf) {
// After the time this is implemented, VEnum may change into a class
// that also implements VNumber and/or VString.
// Handle it first to assert that VEnum is always identified as such
// and not handled as Number.
if (value instanceof VEnum) {
final VEnum enumerated = (VEnum) value;
try {
buf.append(enumerated.getValue());
buf.append(" (").append(enumerated.getIndex()).append(")");
} catch (ArrayIndexOutOfBoundsException ex) { // Error getting label for invalid index?
buf.append("<enum ").append(enumerated.getIndex()).append(">");
}
} else if (value instanceof VNumber) {
final VNumber number = (VNumber) value;
final Display display = (Display) number;
format(number.getValue().doubleValue(), display, buf);
} else if (value instanceof VNumberArray) {
final VNumberArray array = (VNumberArray) value;
final Display display = (Display) array;
final ListNumber list = array.getData();
final int N = list.size();
if (N <= MAX_ARRAY_ELEMENTS) {
if (N > 0) format(list.getDouble(0), display, buf);
for (int i = 1; i < N; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
} else {
format(list.getDouble(0), display, buf);
for (int i = 1; i < MAX_ARRAY_ELEMENTS / 2; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
buf.append(", ... (total ").append(N).append(" elements) ...");
for (int i = N - MAX_ARRAY_ELEMENTS / 2; i < N; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
}
} else if (value instanceof VStatistics) {
final VStatistics stats = (VStatistics) value;
final Display display = (Display) stats;
format(stats.getAverage(), display, buf);
buf.append(" [").append(stats.getMin()).append(" ... ").append(stats.getMax());
buf.append(", ").append(stats.getNSamples()).append(" samples");
final Double dev = stats.getStdDev();
if (dev > 0) buf.append(", dev ").append(dev);
buf.append("]");
} else if (value instanceof VString) buf.append(((VString) value).getValue());
else if (value == null) buf.append("null");
else // TODO: VEnumArray, other types?
buf.append(value.toString());
return buf;
}
/**
* Default toString implementation for VNumberArray.
*
* @param vNumberArray the object
* @return the string representation
*/
public static String toString(VNumberArray vNumberArray) {
StringBuilder builder = new StringBuilder();
Class type = ValueUtil.typeOf(vNumberArray);
builder.append(type.getSimpleName()).append("[");
builder.append(format.format(vNumberArray));
builder.append(", size ").append(vNumberArray.getData().size());
appendAlarm(builder, vNumberArray);
appendTime(builder, vNumberArray);
builder.append(']');
return builder.toString();
}
@Override
public Object calculate(List<Object> args) {
VNumberArray numberArray = (VNumberArray) args.get(0);
if (numberArray == null) {
return null;
}
// If no change, return previous
if (previousValue == numberArray) {
return previousResult;
}
Statistics stats = StatisticsUtil.statisticsOf(numberArray.getData());
int nBins = 100;
Range aggregatedRange = Ranges.aggregateRange(stats, previousXRange);
Range xRange;
if (Ranges.overlap(stats, aggregatedRange) >= 0.75) {
xRange = aggregatedRange;
} else {
xRange = stats;
}
IteratorNumber newValues = numberArray.getData().iterator();
double minValueRange = xRange.getMinimum().doubleValue();
double maxValueRange = xRange.getMaximum().doubleValue();
ListNumber xBoundaries =
ListNumbers.linearListFromRange(minValueRange, maxValueRange, nBins + 1);
String unit = numberArray.getUnits();
int[] binData = new int[nBins];
double maxCount = 0;
while (newValues.hasNext()) {
double value = newValues.nextDouble();
// Check value in range
if (Ranges.contains(xRange, value)) {
int bin = (int) Math.floor(Ranges.normalize(xRange, value) * nBins);
if (bin == nBins) {
bin--;
}
binData[bin]++;
if (binData[bin] > maxCount) {
maxCount = binData[bin];
}
}
}
if (previousMaxCount > maxCount && previousMaxCount < maxCount * 2.0) {
maxCount = previousMaxCount;
}
previousMaxCount = maxCount;
previousXRange = xRange;
previousValue = numberArray;
previousResult =
newVNumberArray(
new ArrayInt(binData),
new ArrayInt(nBins),
Arrays.asList(newDisplay(xBoundaries, unit)),
numberArray,
numberArray,
newDisplay(
0.0,
0.0,
0.0,
"count",
NumberFormats.format(0),
maxCount,
maxCount,
maxCount,
Double.NaN,
Double.NaN));
return previousResult;
}
