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Gradient become Nan for 0 value test #586

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Yuhang-7 opened this issue Dec 2, 2022 · 1 comment
Open

Gradient become Nan for 0 value test #586

Yuhang-7 opened this issue Dec 2, 2022 · 1 comment

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@Yuhang-7
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Yuhang-7 commented Dec 2, 2022

The following code is not working:
def loss(x):
return np.linalg.norm(x) ** 2

x = np.zeros([3])
a = grad(loss)(x)
print(a)

Error Message:

/Users/.local/lib/python3.6/site-packages/autograd/numpy/linalg.py:100: RuntimeWarning: invalid value encountered in double_scalars
return expand(g / ans) * x
array([nan, nan, nan])

@hlee13
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hlee13 commented Jan 4, 2023

def loss(x):
# return np.linalg.norm(x) ** 2
return np.dot(x, x)

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@hlee13 @Yuhang-7 and others