How to raise a numpy array to a power? (corresponding to repeated matrix multiplications, not elementwise)
I believe you want numpy.linalg.matrix_power As a quick example: This yields:
numpy
How to normalize a NumPy array to a unit vector?
If you’re using scikit-learn you can use sklearn.preprocessing.normalize:
Convert a tensor to numpy array in Tensorflow?
TensorFlow 2.x Eager Execution is enabled by default, so just call .numpy() on the Tensor object. See NumPy Compatibility for more. It is worth noting (from the docs), Numpy array may share memory with the Tensor object. Any changes to one may be reflected in the other. Bold emphasis mine. A copy may or may not be returned, and this is … Read more
‘DataFrame’ object has no attribute ‘sort’
sort() was deprecated for DataFrames in favor of either: sort_values() to sort by column(s) sort_index() to sort by the index sort() was deprecated (but still available) in Pandas with release 0.17 (2015-10-09) with the introduction of sort_values() and sort_index(). It was removed from Pandas with release 0.20 (2017-05-05).
TypeError: ‘numpy.float64’ object is not callable?
You can’t use the same variable name for a function and a float (in the same namespace). And you both defined a bear function and a bear variable pointing to a float. You need to change one of the two names.
Use a.any() or a.all()
here is the error I get: I have read several posts about a.any() or a.all() but still can’t find a way that really clearly explain how to fix the problem. I see why Python does not like what I wrote but I am not sure how to fix it.
Using Numpy Vectorize on Functions that Return Vectors
numpy.vectorize takes a function f:a->b and turns it into g:a[]->b[]. This works fine when a and b are scalars, but I can’t think of a reason why it wouldn’t work with b as an ndarray or list, i.e. f:a->b[] and g:a[]->b[][] For example: This yields: Ok, so that gives the right values, but the wrong dtype. And even worse: yields: So this … Read more
filename.whl is not a supported wheel on this platform
Try updating pip first before you rename pip install –upgrade pip
ValueError: setting an array element with a sequence
From the code you showed us, the only thing we can tell is that you are trying to create an array from a list that isn’t shaped like a multi-dimensional array. For example or will yield this error message, because the shape of the input list isn’t a (generalised) “box” that can be turned into … Read more
TypeError: cannot unpack non-iterable int objec
Just replace return 0 by return 0, 0, or better: raise an error instead of returning 0 When your if condition is True, you only return 0. Then later, when you do agg, gps = get_grps(…), you tell python to unpack the result of the function. Then, python is expecting a 2-length iterable, and try to unpack it, but as it says: … Read more