問題描述

我正在嘗試迭代使用 numpy.linspace 生成的值數(shù)組:

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)

這段代碼在我的辦公室電腦上運(yùn)行良好，但我今天早上坐在家里的另一臺(tái)機(jī)器上工作，出現(xiàn)了這個(gè)錯(cuò)誤:

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:	empgssm_arcpy.1.0.3.py", line 147, in AnalyzeSightLine
  for index,point in slX:
TypeError: 'numpy.float64' object is not iterable

slX 只是一個(gè)浮點(diǎn)數(shù)組，腳本打印內(nèi)容沒有問題——只是，顯然是迭代它們.關(guān)于導(dǎo)致它崩潰的任何建議以及可能的修復(fù)方法?

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?

推薦答案

numpy.linspace() 為您提供一維 NumPy 數(shù)組.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

無法工作.您將需要某種二維數(shù)組，其中包含兩個(gè)二維元素:

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]])

現(xiàn)在你可以這樣做了:

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

1 2
4 5

這篇關(guān)于'numpy.float64' 對象不可迭代的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！