datazoom.type:none时数据超出了坐标轴echarts 柱状配置项内容和展示

怎么才能使其显示在坐标轴里面，不要超出外面

      option = {
			title: {
				text: '时间跨度图',
				subtext: '数据来自网络'
			},
			tooltip: {
				trigger: 'axis',
				axisPointer: {
					type: 'shadow'
				}
			},
			legend: {
				data: ['持续时间']
			},
			grid: {
				left: '3%',
				right: '4%',
				bottom: '3%',
				containLabel: true
			},
			xAxis: {
				type: 'time',
				min:new Date("2015/08/22")
			},
			yAxis: {
				type: 'category',
				data: ['小明','小红','小刚','小算','小图','小美']
			},
			dataZoom: [
			{
				id: 'dataZoomX',
				type: 'slider',
				xAxisIndex: [0],
				filterMode: 'none'
			},
			{
				type: 'inside',
				xAxisIndex: [0],
				filterMode: 'none'
			},
			{
				type: 'inside',
				yAxisIndex: [0],
			}
			],
			series: [
			{
				name: '开始时间',
				type: 'bar',
				stack:'ri',
				itemStyle:{
					normal:{
						barBorderColor:'rgba(0,0,0,0)',
						color:'rgba(0,0,0,0)'
					},
					emphasis:{
						barBorderColor:'rgba(0,0,0,0)',
						color:'rgba(0,0,0,0)'
					}
				},
				data: ['2015-08-27', '2015-09-25', '2015-09-7', '2015-09-7','2015-09-12','2015-09-14']
			},
			{
				name: '持续时间',
				type: 'bar',
				stack:'ri',
				data: ['2015-09-27', '2015-10-25', '2015-10-7', '2015-10-7','2015-10-12','2015-10-14']
			}
			]
		};