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Fixed #1119 Pandas to NumPy array read-only error #1120

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Merged
NimaSarajpoor merged 2 commits into from
Jan 23, 2026
Merged

Fixed #1119 Pandas to NumPy array read-only error #1120

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b804512
Fixed #1119 Pandas to NumPy array read-only error
seanlaw Jan 23, 2026
614b08f
Updated docstrings
seanlaw Jan 23, 2026
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23 changes: 15 additions & 8 deletions stumpy/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2117,8 +2117,9 @@ def _preprocess(T, copy=True):
Time series or sequence

copy : bool, default True
A boolean value that indicates whether the process should be done on
input `T` (False) or its copy (True).
A boolean value that indicates whether the process should be performed on
input array `T` (False) or its copy (True). If `T` is a dataframe, then the
data is always copied into a brand new array.

Returns
-------
Expand All @@ -2133,6 +2134,9 @@ def _preprocess(T, copy=True):

T = transpose_dataframe(T)

if "pandas" in str(type(T)):
T = T.to_numpy(copy=True)

if "polars" in str(type(T)):
T = T.to_numpy(writable=True)

Expand Down Expand Up @@ -2170,8 +2174,9 @@ def preprocess(
Window size

copy : bool, default True
A boolean value that indicates whether the process should be done on
input `T` (False) or its copy (True).
A boolean value that indicates whether the process should be performed on
input array `T` (False) or its copy (True). If `T` is a dataframe, then the
data is always copied into a brand new array.

M_T : numpy.ndarray, default None
Rolling mean
Expand Down Expand Up @@ -2233,8 +2238,9 @@ def preprocess_non_normalized(T, m, copy=True):
Window size

copy : bool, default True
A boolean value that indicates whether the process should be done on
input `T` (False) or its copy (True).
A boolean value that indicates whether the process should be performed on
input array `T` (False) or its copy (True). If `T` is a dataframe, then the
data is always copied into a brand new array.

Returns
-------
Expand Down Expand Up @@ -2293,8 +2299,9 @@ def preprocess_diagonal(
corresponding value set to False in this boolean array.

copy : bool, default True
A boolean value that indicates whether the process should be done on
input `T` (False) or its copy (True).
A boolean value that indicates whether the process should be performed on
input array `T` (False) or its copy (True). If `T` is a dataframe, then the
data is always copied into a brand new array.

Returns
-------
Expand Down