python - How do I do conditional array arithmetic on a numpy array? -


I'm trying to get better hold of numpy arrays, so I have a sample question to ask them: < / P>

Say I'm called a lower array. I want to execute those values ​​on those increments which are less than 0 and the rest leave alone, for example, if I was: 

  a = np.array ([ 1,2,3, -1, -2, -3])

I would like to return: 

  ([1,2,3, 0, -1, -2])

What is the most compact syntax for this?

Thank you! 

 in  [45]: a = np.array ([1,2,3, -1, -2, -3]) in [46]: one [a & lt; 0] + = 1 in [47]: One out [47]: array ([1, 2, 3, 0, -1, -2])

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