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Tag: scipy

Why can’t I install a Python package with the Python requirement “>=3.8,<3.11" into a Poetry project with the Python version "^3.9"?

I’m having an issue installing dependencies into my Poetry project. If I run poetry new (as described in https://python-poetry.org/docs/basic-usage/), I can create a new project: My project structure looks like this after I delete a few files not needed for this reproduction: My pyproject.toml file looks like this: When I run poetry add scipy, it tries to install the latest

scipy.signal.find_peaks return empty properties

I tried to obtain properties from scipy.signal.find_peaks, but it returns an empty dictionary {}. Can anyone help to fix it? Answer The problem is that you are passing None to prominence. None is already the default value, and is used to signal that no value for the argument was given. Pass a numeric value as below: Output

Is there a function in sympy or scipy that corresponds to massMatrixForm in matlab?

I am learning rigid body kinematics from: https://rotations.berkeley.edu/the-poisson-top-with-friction/ . The link to the matlab source code is at the bottom of the page. Derive the Poisson top’s equations of motion: http://rotations.berkeley.edu/wp-content/uploads/2017/10/derive_poisson_top_ODEs.txt Solve the Poisson top’s equations of motion: http://rotations.berkeley.edu/wp-content/uploads/2017/10/solve_poisson_top_ODEs.txt I rewrote most of the code for the derivation process in python, though may not be elegant code. In fact, it

Define correct scipy.signal.spectrogram input parameters

I have the following code: which is giving me the following plot: What is the correct way to define the correct parameters, namely: nperseg, nfft and noverlap to obtain a correct and smooth plot? Thank you! Plot of the input signal: Answer I was able to solve this issue by normalising the input signal and doing:

NumPy array row differences

I have a NumPy array vectors = np.random.randn(rows, cols). I want to find differences between its rows according to some other array diffs which is sparse and “2-hot”: containing a 1 in its column corresponding to the first row of vectors and a -1 corresponding to the second row. Perhaps an example shall make it clearer: then I can compute

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