Prevent strings being truncated when replacing values in a numpy array

Question

Lets say I have arrays a and b

a = np.array([1,2,3])
b = np.array([\'red\',\'red\',\'red\'])

If I were to apply s

Answer 1

If you construct such array, the type looks like:

>>> b
array(['red', 'red', 'red'], dtype=')

This means that the strings have a length of at most 3 characters. In case you assign longer strings, these strings are truncated.

You can change the data type to make the maximum length longer, for example:

b2 = b.astype('

So now we have an array that can store strings up to 10 characters. Note however that if you make the maximum length larger, the size of the matrix will increase.