python / numpy ValueError：预期的1D或2D数组，取而代之的是0D数组

Question

我试图添加我从数据框更改的数组的各个行，并且在添加所有行之后，我试图将数组保存到csv文件中并且我得到此错误：预期的1D或2D数组，得到了0D数组。我认为问题所在的代码如下：

array = dfmain.values
shareArray = array[:1]
shareArray = dividedPV/shareArray
array = shareArray * array
sums = [sum(j) for j in array]
finalArray = np.array(sums, dtype=np.float16) #tried to change it from list to Array to see if that was the problem



#changes the file name to whatever the variables (portname etc) were given above
filename = "calculated_%s_%s_%s.csv" % (portName, inceptionDate, frequency)
np.savetxt("%s.csv", filename, finalArray, delimiter = ",")

任何提示都将不胜感激！

Answer 1

np.savetxt的第一个参数是文件名;你有两个文件名作为参数，实际的数组要保存为第三个参数，它应该是第二个。

即

np.savetxt(filename, finalArray, delimiter=',')