public static Double createEMA(java.util.List<Double> values, int period) {
if (period <= 0) {
throw new IllegalArgumentException("period must be greater than 0");
}
final int size = values.size();
final Core core = new Core();
final int allocationSize = size - core.emaLookback(period);
if (allocationSize <= 0) {
return null;
}
final double[] output = new double[allocationSize];
final MInteger outBegIdx = new MInteger();
final MInteger outNbElement = new MInteger();
double[] _values = ArrayUtils.toPrimitive(values.toArray(new Double[0]));
core.ema(0, values.size() - 1, _values, period, outBegIdx, outNbElement, output);
return output[outNbElement.value - 1];
}
public static double[] computeMA(double[] input, int period, int maType) {
MInteger begin = new MInteger();
MInteger length = new MInteger();
double[] out = new double[input.length - period + 1];
switch (maType) {
case MA_TYPE_SMA:
core.sma(0, input.length - 1, input, period, begin, length, out);
break;
case MA_TYPE_EMA:
core.ema(0, input.length - 1, input, period, begin, length, out);
break;
case MA_TYPE_WMA:
core.wma(0, input.length - 1, input, period, begin, length, out);
break;
default:
throw new RuntimeException("unsupported MaType " + maType);
}
return out;
}