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fix changes made to initializatino in #1078

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This commit is contained in:
Martin Bubel 2024-07-21 17:00:37 +02:00
parent 0c78b17cde
commit 8274d02147
1 changed files with 20 additions and 12 deletions
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32
GPy/util/initialization.py
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@ -13,23 +13,21 @@ def initialize_latent(init, input_dim, Y):
"""
:param init: initialization method for the latent space, 'PCA' or 'random'
"""
# dealing with depcrecated initialization method
# should be remove along the next major release
if init == "empirical_samples":
warnings.warn(
"Deprecated initialization method 'empirical_samples'. "
"Use 'random' instead.",
DeprecationWarning,
)
init == "random"
Xr = np.asfortranarray(np.random.normal(0, 1, (Y.shape[0], input_dim)))
if "PCA" == init:
p = PCA(Y)
PC = p.project(Y, min(input_dim, Y.shape[1]))
Xr[: PC.shape[0], : PC.shape[1]] = PC
var = 0.1 * p.fracs[:input_dim]
elif init == "random":
elif init == "empirical_samples":
# dealing with depcrecated initialization method
# should be remove along the next major release
warnings.warn(
"Deprecated initialization method 'empirical_samples'. "
"Use 'random' instead.",
DeprecationWarning,
)
from ..util.linalg import tdot
from ..util import diag
@ -42,8 +40,18 @@ def initialize_latent(init, input_dim, Y):
)
Xr[: EMP.shape[0], : EMP.shape[1]] = EMP
var = np.random.uniform(0.5, 1.5, input_dim)
else:
elif init == "random":
var = Xr.var(0)
else:
# dealing with depcrecated initialization method
# should be remove along the next major release
warnings.warn(
f"{init} is not a valid initialization method."
"Supoprt for anything else than 'PCA' or 'random' will be removed in the next major release.",
DeprecationWarning,
)
var = Xr.var(0)
Xr -= Xr.mean(0)
Xr /= Xr.std(0)