y轴坐标值不是累加的，出现了0.04->0.05->0.06->0.02，0.02出现在了y轴的最大值处

[zealjiang]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

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2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

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Desktop (please complete the following information):

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• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

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• OS: [e.g. iOS8.1]
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[weiqingtangx]

Could you please provide the example data and configuration to help us reproduce the error.