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[re_with_feedback] Deprecation Issue in Numpy #428

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mmcky opened this issue Dec 4, 2024 · 3 comments · Fixed by #435
Closed

[re_with_feedback] Deprecation Issue in Numpy #428

mmcky opened this issue Dec 4, 2024 · 3 comments · Fixed by #435
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@HumphreyYang

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@mmcky
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mmcky commented Dec 4, 2024 

/tmp/ipykernel_4089/4040936680.py:9: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
  m_seq[0] = G @ x0
/tmp/ipykernel_4089/4040936680.py:10: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
  p_seq[0] = F @ x0
/tmp/ipykernel_4089/4040936680.py:18: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
  m_seq[t+1] = G @ x
/tmp/ipykernel_4089/4040936680.py:19: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
  p_seq[t+1] = F @ x
@mmcky
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mmcky commented Dec 5, 2024 •
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@HumphreyYang not sure why this error is coming up

<ipython-input-7-ab9e2905e28b>:9: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
  m_seq[0] = G @ x0

To me this code looks like matrix multiplication between two vectors where both G and x0 have dimension of 3. Any ideas? What am I missing here.

@HumphreyYang
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I think G @ x0 gives a nested array so it has ndim > 0 (e.g. [[0]]), but it is assigned to m_seq[0] as a scalar. So we can probably fix this by [m_seq[0]] = G @ x0.

I can have a go tomorrow once I finish my presentation.

@mmcky
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mmcky commented Dec 5, 2024 •
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Ah! smart.

We could also try the RHS as (G @ x0)[0] but it's pretty ugly notation.

@HumphreyYang HumphreyYang mentioned this issue Dec 10, 2024
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@HumphreyYang HumphreyYang self-assigned this Dec 10, 2024
@mmcky mmcky closed this as completed in #435 Jan 4, 2025
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[re_with_feedback] Remove Deprecation Issue in Numpy QuantEcon/lecture-python.myst
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