'numpy.float64'对象不可迭代 [英] 'numpy.float64' object is not iterable

问题描述

我正在尝试迭代使用numpy.linspace生成的值数组：

I'm trying to iterate an array of values generated with numpy.linspace:

slX = numpy.linspace(obsvX, flightX, numSPts)
slY = np.linspace(obsvY, flightY, numSPts)

for index,point in slX:
    yPoint = slY[index]
    arcpy.AddMessage(yPoint)

此代码在我的办公室电脑上工作正常，但我今天早上坐下来在不同的机器上从家工作，出现了这个错误：

This code worked fine on my office computer, but I sat down this morning to work from home on a different machine and this error came up:

File "C:\temp\gssm_arcpy.1.0.3.py", line 147, in AnalyzeSightLine
  for index,point in slX:
TypeError: 'numpy.float64' object is not iterable

slX 只是一个浮点数组，脚本打印内容没有问题 - 只是，显然是在迭代它们。是什么导致它破坏的建议和可能的修复？

slX is just an array of floats, and the script has no problem printing the contents -- just, apparently iterating through them. Any suggestions for what is causing it to break, and possible fixes?

推荐答案

numpy.linspace（） 为您提供一维NumPy数组。例如：

numpy.linspace() gives you a one-dimensional NumPy array. For example:

>>> my_array = numpy.linspace(1, 10, 10)
>>> my_array
array([  1.,   2.,   3.,   4.,   5.,   6.,   7.,   8.,   9.,  10.])

因此：

for index,point in my_array

无效。你需要某种二维数组，在第二维中有两个
元素：

cannot work. You would need some kind of two-dimensional array with two elements in the second dimension:

>>> two_d = numpy.array([[1, 2], [4, 5]])
>>> two_d
array([[1, 2], [4, 5]])

现在你可以这样做：

>>> for x, y in two_d:
    print(x, y)

1 2
4 5

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