2
I generated a zero matrix through the code:
import numpy as np
lista = np.zeros([4,4])
Later, I tried to replace an element of the matrix with some string (for example "a"). However, I made an error.
lista[0][0]="a"
How should I proceed?
2
I generated a zero matrix through the code:
import numpy as np
lista = np.zeros([4,4])
Later, I tried to replace an element of the matrix with some string (for example "a"). However, I made an error.
lista[0][0]="a"
How should I proceed?
0
You have to define the type of the array you are creating so that it can accept a string, or a character: When setting the array type to S1, it will only save the first character of the string:
import numpy as np
lista = np.zeros([4,4], dtype='|S1')
lista[0][0] = 'Aaaaa'
The result of the above code will be:
[['A' '' '' '']
['' '' '' '']
['' '' '' '']
['' '' '' '']]
If you want to save an entire String, you should set the value '|S5 to "dtype"':
import numpy as np
lista = np.zeros([4,4], dtype='|S5')
lista[0][0] = 'Aaaaaa'
And the result will be:
[['Aaaaa' '' '' '']
['' '' '' '']
['' '' '' '']
['' '' '' '']]
Here is the documentation for these dtypes of a numpy matrix.
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It makes no sense that you have a heterogeneous matrix. Why you need to have zeros and strings in the same matrix?
– Woss