[Feature] 设置了主次坐标轴后，Y轴的最大值与数据本身的最大值，差距太大

[gb853940223]

What problem does this feature solve?

使用echarts，设置了主次坐标轴，但是发现Y轴上的最大值与数据本身最大值，差距很大。如图，数据本身的最大值是7210，但是左侧Y轴的最大值显示的是14000，导致用户产生数据错误的印象。

What does the proposed API look like?

请告诉一个方法，可以在这种情况下，可以减少Y轴最大值与数据真实最大值的配置方式。

[echarts-bot]

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TRANSLATED

TITLE

[Feature] After setting the primary and secondary axis, the maximum value of the Y axis is too different from the maximum value of the data itself

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What problem does this feature solve?

Using echarts, I set the primary and secondary axes, but found that the maximum value on the Y axis is very different from the maximum value of the data itself. As shown in the figure, the maximum value of the data itself is 7210, but the maximum value of the left Y axis shows 14000, causing users to have the impression that the data is wrong.

### What does the proposed API look like?

Please tell me a method that can reduce the Y-axis maximum value and the true maximum value of the data in this case.

[Justin-ZS]

数据本身的最大值是 7210

看图表最大值不是超过 12000么

[gb853940223]

柱状图对照的是右侧次坐标Y轴，真实数据最大值是31左右，所以图表渲染的右侧次坐标Y轴的最大值是35，这个没有问题。折线图对照的是左侧主坐标Y轴，真实数据最大值是7210，但是图表渲染的左侧主坐标Y轴的最大值是14000，快是7210的2倍了。预期是左侧主坐标Y轴的最大值是7500或者是8000。

[Justin-ZS]

推测是因为你设置了 alignTicks，去掉就行了
如果去不掉就只能自己算 max