createSet

private LineDataSet createSet() {

        LineDataSet set = new LineDataSet(null, "Brain waves");
        set.setAxisDependency(YAxis.AxisDependency.LEFT);
        set.setColor(Color.GREEN);
        set.setCircleColor(Color.WHITE);
        set.setLineWidth(2f);
        set.setCircleRadius(4f);
        set.setFillAlpha(65);
        set.setFillColor(Color.GREEN);
        set.setHighLightColor(Color.rgb(244, 117, 117));
        set.setValueTextColor(Color.WHITE);
        set.setValueTextSize(9f);
        set.setDrawValues(false);
        return set;
    }