numpy的:创建2以假乱真一系列复杂? [英] Numpy: Creating a complex array from 2 real ones?
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问题描述
我发誓,这应该是这么容易......为什么不能? (
其实,我想结合2件在同一阵列,使一系列复杂的:
数据[:,:,:,0],数据[:,:,:,1]
这些不工作:
X = np.complex(数据[:,:,:,0],数据[:,:,:,1])
X =络合物(数据[:,:,:,0],数据[:,:,:,1])
我缺少的东西吗?难道numpy的不喜欢在复数执行阵列功能呢?这里的错误:
类型错误:只有长度为1的阵列可以转换到Python标量
解决方案
这似乎做你想要什么:
numpy.apply_along_axis(拉姆达ARGS:复杂的(*参数)],3,数据)
下面是另一种解决方案:
numpy.vectorize(复)(数据[...,0],数据[...,1])#省略号相当于这里:,:,:
和另一个简单的解决方法:
数据[...,0] + 1J *数据[...,1]
PS :如果你想节省内存(没有中间排列):
结果= 1J *数据[...,1];结果+ =数据[...,0]
下面的开发者的解决方案也不错。
I swear this should be so easy... Why is it not? :(
In fact, I want to combine 2 parts of the same array to make a complex array:
Data[:,:,:,0] , Data[:,:,:,1]
These don't work:
x = np.complex(Data[:,:,:,0], Data[:,:,:,1])
x = complex(Data[:,:,:,0], Data[:,:,:,1])
Am I missing something? Does numpy not like performing array functions on complex numbers? Here's the error:
TypeError: only length-1 arrays can be converted to Python scalars
解决方案
This seems to do what you want:
numpy.apply_along_axis(lambda args: [complex(*args)], 3, Data)
Here is another solution:
numpy.vectorize(complex)(Data[...,0], Data[...,1]) # The ellipsis is equivalent here to ":,:,:"
And yet another simpler solution:
Data[...,0] + 1j * Data[...,1]
PS: If you want to save memory (no intermediate array):
result = 1j*Data[...,1]; result += Data[...,0]
devS' solution below is also good.
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