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      maintainAspectRatio: false,
      animation: {
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      legend: {
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        display: false,
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      elements: {
        line: {
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          radius: 0
        }
      },
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            }
            if (tooltipModel.body) {
                var titleLines = tooltipModel.title || [];
                var bodyLines = tooltipModel.body.map(getBody);
                var innerHtml = '<thead>';
                titleLines.forEach(function(title) {
                    innerHtml += '<tr><th>' + title + '</th></tr>';
                });
                innerHtml += '</thead><tbody>';
                bodyLines.forEach(function(body, i) {
                  var colors = tooltipModel.labelColors[i];
                  var style = 'background:' + colors.backgroundColor;
                  style += '; border-color:' + colors.borderColor;
                  style += '; border-width: 2px';
                  innerHtml += '<tr><td class="text-nowrap">' + body + '</td></tr>';
                });
                innerHtml += '</tbody>';
                var tableRoot = tooltipEl.querySelector('table');
                tableRoot.innerHTML = innerHtml;
            }
            var position = this._chart.canvas.getBoundingClientRect();
            tooltipEl.style.borderRadius = '0.3rem';
            tooltipEl.style.backgroundColor = 'rgba(0,0,0,0.9)';
            tooltipEl.style.color = '#fff';
            tooltipEl.style.opacity = 1;
            tooltipEl.style.position = 'absolute';
            tooltipEl.style.top = position.top + window.pageYOffset + tooltipModel.caretY + 'px';
            tooltipEl.style.fontFamily = tooltipModel._bodyFontFamily;
            tooltipEl.style.fontSize = tooltipModel.bodyFontSize;
            tooltipEl.style.fontStyle = 'tooltipModel._bodyFontStyle';
            tooltipEl.style.padding = tooltipModel.yPadding + 'px ' + tooltipModel.xPadding + 'px';
            tooltipEl.style.pointerEvents = 'none';
            var tooltip_width = document.getElementById("chartjs-tooltip").clientWidth;
            var cursor_position = position.left + window.pageXOffset + tooltipModel.caretX;
            var page_width = $(window).width();
            tooltipEl.style.left = page_width < tooltip_width + cursor_position
              ? position.left + window.pageXOffset + tooltipModel.caretX - tooltip_width + 'px'
              : position.left + window.pageXOffset + tooltipModel.caretX + 'px';
        }
      }
    }
  });
  var allData = myChart.data.datasets.reduce(function(acc, dataset) {
    return acc.concat(dataset.data.filter(function(value) {
      return value !== null; // nullを除外する
    }));
  }, []);
  var minValue = Math.min.apply(null, allData);
  $('#cheapest').html(minValue.toLocaleString() + '円');
});