ValueError:对象类型< class'pandas.core.series.Series'>没有名为1的轴. [英] ValueError: No axis named 1 for object type <class 'pandas.core.series.Series'>

问题描述

我是编程新手.我正在尝试使用scipy最小化，遇到了几个问题，并解决了大多数问题.

I´m new to programming. I´m trying to use scipy minimize, had several issues and gotten through most of them.

现在这是代码，但我不明白为什么会收到此错误.

Right now this is the code, but I'm not understanding why I´m getting this error.

par_opt = so.minimize(fun=fun_obj, x0=par_ini, method='Nelder-Mead', args=[series_pt_cal, dt, series_caudal_cal])

推荐答案

OP没有提供足够的信息，但基本上是在代码中指定的某个位置，以便由数据框列(axis = 1)对对象进行操作熊猫系列.如果代码通常可以正常工作，但偶尔会出现错误，请检查数据帧可能只有1行的退化情况.熊猫习惯于猜测自己想要的内容-可能会决定将1行数据框缩小为一个系列(例如apply()函数;您可以在其中使用reduce=False禁用它).

Not enough info is given by the OP, but basically somewhere in the code it's specified to operate by data frame column (axis=1) on an object that is a Pandas Series. If the code typically works but occasional gives errors, check for degenerative cases where a data frame may have only 1 row. Pandas has a nasty habit of guessing what you want -- it may decide to reduce a 1-row data frame to a Series (e.g., the apply() function; you can disable that by using reduce=False in there).

添加一行代码以检查对象是否为isinstance(df, pd.DataFrame)，否则将有问题的熊猫系列转换为数据框，例如s.to_frame().T，以解决我必须处理的问题.

Add a line of code to check the object is isinstance(df, pd.DataFrame) or else convert the offending pandas Series to a data frame, something like s.to_frame().T for the problems I had to deal with.

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