java - Calculating Skewness and kurtosis with apache commons -

i have datapoints in vector , calculate skewness , kurtosis of dataset.

how go apache commons?

vector<double> mydata = new vector<double> //data points added routing 

the code found in documentation goes this:

    fourthmoment m4 = new fourthmoment();     mean m = new mean(m4);     variance v = new variance(m4);     skewness s= new skewness(m4);     kurtosis k = new kurtosis(m4);     assertequals(var,v.getresult(),tolerance);     assertequals(skew ,s.getresult(),tolerance); 

but fourthmoment not recognised compiler. , how mydata in there?

thanks help, can not seem clear examples.

i use version 3.1.1 , recognises imports, except first one:

import org.apache.commons.math3.stat.descriptive.moment.fourthmoment; import org.apache.commons.math3.stat.descriptive.moment.kurtosis; import org.apache.commons.math3.stat.descriptive.moment.mean; import org.apache.commons.math3.stat.descriptive.moment.skewness; import org.apache.commons.math3.stat.descriptive.moment.variance; 

do need fourth moment? or can calculate based on vector?

i think can calculate directly, using kurtosis.evaluate().