Informatics Practices
Identify the correct statement :
- The standard marker for missing data in Pandas is NaN.
- Series act in a way similar to that of an array
- Both (a) and (b)
- None of the above
Answer
Both (a) and (b)
Reason — NaN stands for "Not a Number" and is used in Pandas to represent missing or undefined values in a Series or DataFrame. A Series in Pandas is similar to a one-dimensional array or list in Python. It has an index and a corresponding array of data values. Series can be accessed, sliced, and manipulated in ways similar to arrays.
Related Questions
To change the 5th column's value at 3rd row as 35 in dataframe DF, you can write …………… .
- DF[4, 6] = 35
- DF[3, 5] = 35
- DF.iat[4, 6] = 35
- DF.iat[3, 5] = 35
Which among the following options can be used to create a DataFrame in Pandas ?
- A scalar value
- An ndarray
- A python dict
- All of these
Identify the correct option to select first four rows and second to fourth columns from a DataFrame 'Data':
- display(Data.iloc[1 : 4, 2 : 4])
- display(Data.iloc[1 : 5, 2 ; 5])
- print(Data.iloc[0 : 4, 1 : 4])
- print(Data.iloc[1 : 4, 2 : 4])
To delete a column from a DataFrame, you may use …………… statement.
- remove
- del
- drop
- cancel