Add option to allow precision adjustment

I have do it in mu custom module.Not in the same chart module.
and i have to set ,

chart\chart_views\includes\views\chart_views_plugin_style_chart.inc\line 18

function options(&$options) {
// Get the default chart values
$options['aggregation_field'] = '';
$options['calc_fields'] = array();
$options['calc'] = 'COUNT';
$options['precision'] = 0; // 2 to 0.
}