1d array to one hot

One hot encoding numpy

  labels = (np.arange(num_labels) == labels[:,None]).astype(np.float32)

1d array to one hot

>>> a = np.array([1, 0, 3])
>>> b = np.zeros((a.size, a.max()+1))
>>> b[np.arange(a.size),a] = 1
>>> b
array([[ 0.,  1.,  0.,  0.],
       [ 1.,  0.,  0.,  0.],
       [ 0.,  0.,  0.,  1.]])

Source: stackoverflow.com

Similar codes

219 votes346 views6 answers
Random numbers python
Python
0 vote128 views1 answer
Cget subassembly civid3d
Python
0 vote133 views1 answer
Random Hex Colors bar generator, python turtle
Python
48 votes131 views5 answers
How to change int to string in python
Python
55 votes128 views3 answers
Python read values from file
Python
0 vote187 views1 answer
How i rwrite conditon to create 1 or 0 label from two probability column python
Python
0 vote148 views2 answers
Mysql config not found
Python
0 vote138 views1 answer
How to access http page in pythion
Python
1 vote133 views1 answer
Python convert querydict to dict
Python
9 votes143 views2 answers
Clear terminal in python
Python