Error: typeerror: invalid entry 0 in condlist: should be boolean ndarray
An explanation of the error:
The error message “typeerror: invalid entry 0 in condlist: should be boolean ndarray” indicates that there is an issue with the condition list provided in the code. In NumPy, the condition list should be a boolean ndarray (array) where each element evaluates to either True or False.
Detailed explanation:
When using conditional statements or functions in NumPy, such as np.where(), np.select(), or np.piecewise(), the condition list should consist of boolean values, which means that each element of it must evaluate to either True or False. However, in your code, there seems to be an invalid entry at position 0 in the condition list.
Example:
import numpy as np
# Defining an invalid condition list
condlist = [1, 2, 3]
choicelist = [4, 5, 6]
result = np.select(condlist, choicelist)
print(result) # This will raise the mentioned error
In this example, the condition list “condlist” contains integers (1, 2, 3) instead of boolean values. As a result, when the np.select() function tries to evaluate the conditions, it encounters the invalid entry 0 at position 0 in the condition list, which causes the error to occur.
To fix this error, make sure that the condition list contains boolean ndarray elements that evaluate to either True or False.