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+--- Thread: while creating a array using numpy.arrange, how to negate only the last 50 numbers? (/thread-17240.html)
while creating a array using numpy.arrange, how to negate only the last 50 numbers? - vicky53 - Apr-03-2019
I'm creating an array using numpy and trying to negate the numbers from 50 to 100 in seperate steps as below..
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arr = np.arange(100) arr1 = arr[50:100]*-1 arr2=(arr[0:50]) result=np.concatenate([arr2,arr1])Is it possible to negate the intended numbers in the first step itself?
RE: while creating a array using numpy.arrange, how to negate only the last 50 numbers? - scidam - Apr-06-2019
The resulting array includes a gap.
np.arange can not produce arrays with gaps. arr = np.arange(100) arr[50:] *= -1
np.r_[np.arange(50), np.arange(-50, -99, -1)]