HI Michael,
Thank you for your purchase.

Can you please tell me is this happening to all chart.js charts or for some specific chart.

Also please tell me if you update the plugin to 2.3.1 version do you still have the same issue.

Best regards.

Hi Michael,

OK I will note this issue and report to my team also so they can test it out.

If this is a bug we will try to fix it as soon as possible.

Sorry for any inconvenience.

Best regards.

Hi Michael,

I noted this and send to my team i will let you know as soon as I have an answer.

Best regards.

HI Michael,

This is reported and noted to check, when we found a solution I will let you know.

Best regards.

HI Michael,

Sorry for any inconvenience.

We investigated this and it looks like the logic for chart.js are set to start with 0 every time and you can manually change the min and max for the axes.

If you do not want to use this logic can you please go to file 

wp-content/plugins/wpdatatables/source/class.wpdatachart.php around line 2267 and just comment these lines

$this->_chartjs_render_data['options']['options']['scales']['yAxes'][0]['ticks']['beginAtZero'] = true;
$this->_chartjs_render_data['options']['options']['scales']['yAxes'][0]['ticks']['min'] = 0;

to look like this 

//$this->_chartjs_render_data['options']['options']['scales']['yAxes'][0]['ticks']['beginAtZero'] = true;
//$this->_chartjs_render_data['options']['options']['scales']['yAxes'][0]['ticks']['min'] = 0;

Then in file wp-content/plugins/wpDataTables/assets/js/wpdatatables/wdt.chartJS.js around line 50

find this code

beginAtZero: true

and change it to

beginAtZero: false

Then in filewp-content/plugins/wpDataTables/assets/js/wpdatatables/wdt.chartWizard.js around line 1621

find this code

editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.beginAtZero ?    
$('#vertical-axis-min').val(0) : $('#vertical-axis-min').val(editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.min);
$('#vertical-axis-max').val(editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.max);

and comment it to look like this

//editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.beginAtZero ?    
//$('#vertical-axis-min').val(0) : $('#vertical-axis-min').val(editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.min);
//$('#vertical-axis-max').val(editing_chart_data.chartjs_render_data.options.options.scales.yAxes[0].ticks.max);

Let me know the result.

The only possible workaround and proper solution is to create some kind of checkbox which will give the option to choose to start from the 0 or not. Chart.js by default starts from 0.

Best regards.

HI Michael,

We will try to add this for the next update of the plugin, but in the meantime please make a backup of which files are changed just in case.

Best regards.