How to specify axis range without modifying dataset scale?

Question

I would like to know how to set the axis range and achieve the same behavior that Google Image Charts had. Here is the example for the same request URL:

I.e., I have an y value on each 100th of x axis. Is there a way to easily define a dataset 'step' for Image Charts, or I have to create custom labels on x axis with chxl, which I would like to avoid?

Answer 1

Image-Charts founder here :)

Indeed, regarding axis range our documentation is (I hope) explicit:

In Google Image Charts specifying the chxr parameter changed the scale of the axis but not the dataset scale. In Image-Charts — because we think it's was the biggest usage issue with Google Image Charts — changing the axis scale through chxr also impact the whole dataset scale.

You must make an axis visible using the chxt parameter if you want to specify its range.

You will have to use axis range (chxr) to better specify what you want and the steps needed:

chxr=
  <axis_index>,<start_val>,<end_val>,<opt_step>
    |...|
  <axis_index>,<start_val>,<end_val>,<opt_step>