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  1. python - Error "Import Error: No module named numpy" on …

    Mar 19, 2019 · I have only one version of Python 3 installed on my Windows 7 (sorry) 64-bit system. I installed NumPy following this link - as suggested in the question. The installation …

  2. python - Convert Pandas dataframe to NumPy array - Stack …

    Nov 2, 2012 · As mentioned in cs95's answer, to_numpy() will consistently convert a pandas dataframe into a numpy array. On the other hand, because .values (as suggested in 1, 2, 3, 4, …

  3. How do you do natural logs (e.g. "ln()") with numpy in Python?

    Using numpy, how can I do the following: ln(x) Is it equivalent to: np.log(x) I apologise for such a seemingly trivial question, but my understanding of the difference between log and ln is that ...

  4. python - How to remove specific elements in a numpy array

    Jun 12, 2012 · Note that numpy.delete() returns a new array since array scalars are immutable, similar to strings in Python, so each time a change is made to it, a new object is created.

  5. numpy - How to implement the Softmax function in Python

    if you take a look at the numpy documentation, it discusses what sum (x, axis=0)--and similarly axis=1-- does. In short, it provides the direction in which to sum an array of arrays. In this …

  6. python - How can I upgrade NumPy? - Stack Overflow

    File "<string>", line 1, in <module> ImportError: numpy.core.multiarray failed to import I tried to upgrade NumPy, but this is confusing: >>> import numpy >>> print numpy.__version__ 1.6.1 …

  7. python - How to get element-wise matrix multiplication …

    Oct 14, 2016 · It states that numpy.multiply should be used for element-wise multiplication on matrices, but shows an example with arrays. It might be better to show numpy.multiply in …

  8. python - How do I print the full NumPy array, without truncation ...

    You can use the printoptions context manager: with numpy.printoptions(threshold=numpy.inf): print(arr) (of course, replace numpy by np if that's how you imported numpy) The use of a …

  9. python - How do I create an empty array and then append to it in …

    I want to create an empty array and append items to it, one at a time. xs = [] for item in data: xs.append(item) Can I use this list-style notation with NumPy arrays?

  10. python - Most efficient way to map function over numpy array

    Feb 5, 2016 · What is the most efficient way to map a function over a numpy array? I am currently doing: import numpy as np x = np.array([1, 2, 3, 4, 5]) # Obtain array of square ...