If the maximum number of the chart is 3 The highest point of the chart will cut half example below

maximum = 3

maximum = 242.4

Yes. The canvas which chartjs rendering will cut the top of the chart if the column value = 3 but not 242.4. Thanks

by reference "koolreport\amazon\ChartCard"

protected function drawChart($dataStore,$columns,$height,$color,$backgroundColor="transparent")
    {
        if ($columns==array()) {
            $firstRow = $dataStore->get(0);
            $keys = array_keys($firstRow);
            if (count($keys)>1) {
                $columns = array(
                    $keys[0]=>array(),
                    $keys[1]=>array(),
                );
            }
        }

        $keys = array_keys($columns);
        
        if (count($keys)<2) {
            return null;
        }
        
        if (!isset($columns[$keys[1]]["config"])) {
            $columns[$keys[1]]["config"] = array();
        }
        $columns[$keys[1]]["config"]["backgroundColor"] = $backgroundColor;
        $columns[$keys[1]]["config"]["borderColor"] = $color;

        return AreaChart::html(array(
            "dataSource"=>$dataStore,
            "columns"=>$columns,
            "colorScheme"=>array($color),
            "height"=>$height,
            "options"=>array(
                "maintainAspectRatio"=>false,
                "legend"=>array(
                    "display"=>false,
                ),
                "scales"=>array(
                    "xAxes"=>array(
                        array(
                            "display"=>false,
                        )
                    ),
                    "yAxes"=>array(
                        array(
                            "display"=>false,
                        )
                    )
                ),
                "elements"=>array(
                    "line"=>array(
                        "borderWidth"=>2,
                    ),
                    "point"=>array(
                        "radius"=>0,
                        "hitRadius"=>10,
                        "hoverRadius"=>4,
                    )
                )
            )
        ));
    }

            echo $this->drawChart(
                $this->chartDataStore,
                $this->chartColumns,
                "100px",
                "rgba(0,0,255,.55)",
                "rgba(0,0,255,.2)"
            );