python/numpy ValueError : Expected 1D or 2D array, 得到了 0D 数组

Question

我试图添加我从数据帧更改的数组的各个行，在添加所有行后，我试图将数组保存到 csv 文件中，但出现此错误:预期的 1D 或 2D 数组，得到 0D数组代替。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 = ",")

任何提示将非常感谢!

Answer 1

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

IE。

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