title: How does C3js decide the y axis range
body: <p>I'm working with C3.js to build graphs for my JSON data. However, I do not understand what decides the Y-axis ranges on the graph. I have a common code to generate 2 bar charts, out of which one comes as expected whereas the other one has high range for Y-axis causing my data bar being diminished. Please take a look at the image below.</p>
  
  <p><a href="https://i.stack.imgur.com/Kk9fM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Kk9fM.png" alt="enter image description here"></a></p>
  
  <p>The bar chart on the left has data value equal to 1, yet the axis ranges to 35. A similar graph on the right adjust well.</p>
  
  <p>Does anyone know what could be the reason for this?</p>