多元非线性回归

Question

我正在尝试通过使用估算的总成本和工作时间来预测工作的每月成本。 我有一个原始数据，其中包含工作的开始日期，结束日期，总成本，与该工作有关的所有成本以及这些成本的生效日期。 我认为日期日期没有多大意义，所以我找到了5％的时间的数字，然后发现在该时间增量中实现的费用。当我尝试散点图时，会得到如图所示的图像。我的问题是，如何获取转义数据点成行堆积？ 当我绘制总成本与每月成本的关系图时，会遇到相同的问题，因为在确切工作期间进行的所有付款的总成本都相同。

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58.5500000000029, 58.5500000000029, 58.5500000000029, 58.5500000000029, 
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58.5500000000029, 58.5500000000029, 32.1999999999971, 32.1999999999971, 
32.1999999999971, 32.1999999999971, 32.1999999999971, 32.1999999999971, 
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