numpy-ufunc – Tarik Billa

Numpy, multiply array with scalar [duplicate]

May 17, 2023 by Tarik

You can multiply numpy arrays by scalars and it just works. >>> import numpy as np >>> np.array([1, 2, 3]) * 2 array([2, 4, 6]) >>> np.array([[1, 2, 3], [4, 5, 6]]) * 2 array([[ 2, 4, 6], [ 8, 10, 12]]) This is also a very fast and efficient operation. With your example: >>> … Read more

TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced

March 3, 2023 by Tarik

Posting as it might help future users. As correctly pointed out by others, np.isnan won’t work for object or string dtypes. If you’re using pandas, as mentioned here you can directly use pd.isnull, which should work in your case. import pandas as pd import numpy as np var1 = ” var2 = np.nan >>> type(var1) … Read more