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[英]When to use numpy.random.randn(…) and when numpy.random.rand(…)?
[英]'TypeError: an integer is required' when initializing random weight matrix in numpy with numpy.random.randn()
所以我使用 numpy 从矩阵构建神经网络,我有以下初始化代码:
for i in xrange(self.num_layers-1):
self.params['W%d' % i] = np.random.randn(input_dim, hidden_dims) * weight_scale
self.params['b%d' % i] = np.zeros(hidden_dims)
所有变量都是预定义的;
type(input_dim) == integer
type(hidden_dims) == integer
type(self.num_layers) == integer
weight_scale == 1e-3
但是,当我部署它时,出现以下错误:
Traceback (most recent call last):
File "...", line 201, in __init__
self.params['W%d' % i] = np.random.randn(input_dim, hidden_dims) * weight_scale
File "mtrand.pyx", line 1680, in mtrand.RandomState.randn (numpy/random/mtrand/mtrand.c:17783)
File "mtrand.pyx", line 1810, in mtrand.RandomState.standard_normal (numpy/random/mtrand/mtrand.c:18250)
File "mtrand.pyx", line 163, in mtrand.cont0_array (numpy/random/mtrand/mtrand.c:2196)
TypeError: an integer is required
我已尝试搜索此错误,但无法获得任何相关匹配项。 知道出了什么问题吗? 我也尝试过使用 np.random.normal(scale=weigh_tscale, size=(input_dim, hidden_dims)) 并且我收到了相同的
'TypeError: an integer is required'
提前感谢您提供任何线索!
更新:这是使用 python2,而不是 3
您将range
拼错为xrange
。 这将解决您的问题。
for i in range(self.num_layers-1):
self.params['W%d' % i] = np.random.randn(input_dim, hidden_dims) * weight_scale
self.params['b%d' % i] = np.zeros(hidden_dims)
否则, np.random.randn(input_dim, hidden_dims)
不应像np.random.randn((input_dim, hidden_dims))
那样是双括号中的度量大小
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