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Extends the definition of UnivariateStatistic
with
increment(double)
and incrementAll(double[])
methods for adding
values and updating internal state.
This interface is designed to be used for calculating statistics that can be computed in one pass through the data without storing the full array of sample values.
Method Summary | |
void |
clear()
Clears the internal state of the Statistic |
long |
getN()
Returns the number of values that have been added. |
double |
getResult()
Returns the current value of the Statistic. |
void |
increment(double d)
Updates the internal state of the statistic to reflect the addition of the new value. |
void |
incrementAll(double[] values)
Updates the internal state of the statistic to reflect addition of all values in the values array. |
void |
incrementAll(double[] values,
int start,
int length)
Updates the internal state of the statistic to reflect addition of the values in the designated portion of the values array. |
Methods inherited from interface org.apache.commons.math.stat.descriptive.UnivariateStatistic |
evaluate, evaluate |
Method Detail |
public void increment(double d)
d
- the new value.public void incrementAll(double[] values)
values
- array holding the new values to add
java.lang.IllegalArgumentException
- if the array is nullpublic void incrementAll(double[] values, int start, int length)
values
- array holding the new values to addstart
- the array index of the first value to addlength
- the number of elements to add
java.lang.IllegalArgumentException
- if the array is null or the indexpublic double getResult()
Double.NaN
if it
has been cleared or just instantiated.public long getN()
public void clear()
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