mxnet-操作符

[[-0.7568025 -0.7568025]
[-0.7568025 -0.7568025]
[-0.7568025 -0.7568025]]
<NDArray 3x2 @cpu(0)>
[[2. 2. 2.]
[2. 2. 2.]]
<NDArray 2x3 @cpu(0)>
[[-2. -2. -2.]
[-2. -2. -2.]]
<NDArray 2x3 @cpu(0)>
b: [[0. 1.]
[4. 9.]],
c: [[ 2. ?3.]
[ 6. 11.]]

 # -*- coding: utf-8 -*-"""Spyder EditorThis is a temporary script file."""import mxnet as mximport numpy as npa1 = mx.nd.array([10,2,23])a2 = mx.nd.array([1,12,3])f1 = mx.nd.maximum(a1, a2)f2 = mx.nd.minimum(a1, a2)print f1,f2a = mx.nd.ones((2,2))b = mx.nd.ones(a.shape)b += aprint ba = mx.nd.array(np.arange(6).reshape(3,2))print aa[1:2] = 1print a[:].asnumpy()d = mx.nd.slice_axis(a, axis=1, begin=1, end=2)print d.asnumpy()d = mx.nd.slice_axis(a, axis=0, begin=0, end=1)print d.asnumpy()

[10. 12. 23.]
<NDArray 3 @cpu(0)>
[1. 2. 3.]
<NDArray 3 @cpu(0)>

[[2. 2.]
[2. 2.]]
<NDArray 2x2 @cpu(0)>

[[0. 1.]
[2. 3.]
[4. 5.]]
<NDArray 3x2 @cpu(0)>
[[0. 1.]
[1. 1.]
[4. 5.]]
[[1.]
[1.]
[5.]]
[[0. 1.]]

 # -*- coding: utf-8 -*-"""Spyder EditorThis is a temporary script file."""import mxnet as mximport numpy as npa = mx.nd.array(np.arange(24))b = a.reshape((2,3,4))print b.asnumpy()a = mx.nd.ones((2,3))b = mx.nd.ones((2,3))*2c = mx.nd.concat(a,b)print c.asnumpy()a = mx.nd.ones((2,3))b = mx.nd.sum(a)print b.asnumpy()c = mx.nd.sum_axis(a, axis=1)print c.asnumpy()a = mx.nd.array(np.arange(6).reshape(6,1))print ab = a.broadcast_to((6,5)) ?#print b.asnumpy()

[[[ 0. ?1. ?2. ?3.]
[ 4. ?5. ?6. ?7.]
[ 8. ?9. 10. 11.]]

[[12. 13. 14. 15.]
[16. 17. 18. 19.]
[20. 21. 22. 23.]]]
[[1. 1. 1. 2. 2. 2.]
[1. 1. 1. 2. 2. 2.]]
[6.]
[3. 3.]

[[0.]
[1.]
[2.]
[3.]
[4.]
[5.]]
<NDArray 6x1 @cpu(0)>
[[0. 0. 0. 0. 0.]
[1. 1. 1. 1. 1.]
[2. 2. 2. 2. 2.]
[3. 3. 3. 3. 3.]
[4. 4. 4. 4. 4.]
[5. 5. 5. 5. 5.]]

 # -*- coding: utf-8 -*-"""Spyder EditorThis is a temporary script file."""import mxnet as mximport numpy as npa = mx.nd.ones((2,3))c = mx.nd.sum_axis(a, axis=0)print c.asnumpy()a = mx.nd.array(np.arange(6).reshape(6,1))print ac = a.reshape((2,1,1,3))print cd = c.broadcast_to((2,2,2,3))print d.asnumpy()a = mx.nd.ones((3,2))b = mx.nd.ones((1,2))c = a + bprint c.asnumpy()a = mx.nd.ones((2,2))b = aprint b is ac=b.copy()print c is ad=ca.copyto(d)print dprint d is a,d is c

[2. 2. 2.]

[[0.]
[1.]
[2.]
[3.]
[4.]
[5.]]
<NDArray 6x1 @cpu(0)>

[[[[0. 1. 2.]]]

[[[3. 4. 5.]]]]
<NDArray 2x1x1x3 @cpu(0)>
[[[[0. 1. 2.]
[0. 1. 2.]]

[[0. 1. 2.]
[0. 1. 2.]]]

[[[3. 4. 5.]
[3. 4. 5.]]

[[3. 4. 5.]
[3. 4. 5.]]]]
[[2. 2.]
[2. 2.]
[2. 2.]]
True
False

[[1. 1.]
[1. 1.]]
<NDArray 2x2 @cpu(0)>
False True

mxnet-操作符

原文地址：http://blog.51cto.com/13959448/2316999