The where country_name='[cb_country]' doesn't seem to work although the error in the front-end shows the correct value: county_name='Brazil' which is the country of the specific user.
The [ ] is used by Community Builder as field substitution so it works for the specific user.
It is important to me as each graph will change according to the corresponding related table data for the specific user.
When I explicitly use county_name='Brazil' it works fine.
php-rgraph has a responive parameter which may be defined globally via pugin parms or via php-graph plugin tag for a single chart..
With it you define how chart should be displayed if browser size (client size) is changed or if you are using a device like smartphone or tablet with smaller screensizes
Parameter consist of 3 values (separated by commas):
1. scale factor for resizing chart's properties
2. small client size
4. large client size