AutoAxis.java

 //Automatically calculates Y axis values.
	 private Axis calculateYAxis(int numberOfSteps) {
	 if (numberOfSteps < 2) {
	 throw new
	 IllegalArgumentException("Number or steps have to be grater or equal 2");
	 }
	 List<Float> values = new ArrayList<Float>();
	 final float range = mData.getMaxYValue() - mData.getMinYValue();
	 final float tickRange = range / (numberOfSteps - 1);
	 final float x = (float) Math.ceil(Math.log10(tickRange) - 1);
	 final float pow10x = (float) Math.pow(10, x);
	 final float roundedTickRange = (float) Math.ceil(tickRange / pow10x) *
	 pow10x;
	 float value = mData.getMinYValue();
	 while (value <= mData.getMaxYValue()) {
	 values.add(value);
	 value += roundedTickRange;
	 }
	 Axis yAxis = new Axis();
	 yAxis.setValues(values);
	 return yAxis;
	 }