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The FACT telescope is a Cherenkov telescope on the island of La Palma. This set of tools is dedicated to read, parse and process raw data produced by the FACT telescope.

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package fact.statistics;

import fact.Utils;
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import stream.Data;
import stream.Processor;

import java.io.Serializable;

/**
 * This operator calculates the rms of the array specified by the key
 * 
 *  @author Kai Bruegge <[email protected]>
 */
public class ArrayRMS implements Processor {
	static Logger log = LoggerFactory.getLogger(ArrayRMS.class);
	private String key;
	private String outputKey = "rms";
	
	@Override
	public Data process(Data input) {
		Utils.isKeyValid( input, key, Double[].class);
		Serializable data = input.get(key);
		DescriptiveStatistics descriptiveStatistics = new DescriptiveStatistics(Utils.toDoubleArray(data));
		
		//get the sqrt of the sum of squares. Lets call it RMS. Cause we can.
		input.put(outputKey , Math.sqrt( descriptiveStatistics.getSumsq()) );
		return input;
	}

	
	public String getKey() {
		return key;
	}
	public void setKey(String key) {
		this.key = key;
	}

	
	public String getOutputKey() {
		return outputKey;
	}
	public void setOutputKey(String outputKey) {
		this.outputKey = outputKey;
	}
}