Method getOnlineDenseStats

JSAT/src/jsat/DataSet.java:319–326

Returns an OnLineStatistics object that is built by observing what proportion of each data point contains non zero numerical values. A mean of 1 indicates all values were fully dense, and a mean of 0 indicates all values were completely sparse (all zeros). @return statistics on the percent

()

     * @return statistics on the percent sparseness of each data point
     */
    public OnLineStatistics getOnlineDenseStats()
    {
        OnLineStatistics stats = new OnLineStatistics();
        double N = getNumNumericalVars();;
        for(int i = 0; i < getSampleSize(); i++)
            stats.add(getDataPoint(i).getNumericalValues().nnz()/N);
        return stats;
    }
    
    /**
     * Computes the weighted mean and variance for each column of feature