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Fix the "center" of CMAES to be 1-dimensional #111

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Aug 2, 2024
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Fix the "center" of CMAES to be 1-dimensional #111

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8 changes: 7 additions & 1 deletion src/evotorch/algorithms/cmaes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -251,7 +251,13 @@ def __init__(
center_init = center_init.values.clone()

# Store the center
self.m = self._problem.make_tensor(center_init)
self.m = self._problem.make_tensor(center_init).squeeze()
valid_shaped_m = (self.m.ndim == 1) and (len(self.m) == self._problem.solution_length)
if not valid_shaped_m:
raise ValueError(
f"The initial center point was expected as a vector of length {self._problem.solution_length}."
" However, the provided `center_init` has (or implies) a different shape."
)

# Store the initial step size
self.sigma = self._problem.make_tensor(stdev_init)
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