public String getAxisYGraduate(Object value) {
		float valueLength = ((Float) value).floatValue()
				- dataQuadrant.getPaddingStartY();
		return String
				.valueOf(1f - valueLength / this.dataQuadrant.getPaddingHeight());
	}
@param axisXColor
           the axisXColor to set
src/src/cn/limc/androidcharts/view/GridChart.java