Method gradConvgHelper

JSAT/src/jsat/math/optimization/LBFGS.java:199–207

(Vec grad)

    }
    
    private double gradConvgHelper(Vec grad)
    {
        if(!inftNormCriterion)
            return grad.pNorm(2);
        double max = 0;
        for(IndexValue iv : grad)
            max = Math.max(max, Math.abs(iv.getValue()));
        return max;
    }

    /**
     * Sets the number of history items to keep that are used to approximate the