Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier.
dataframe.notna() function detects existing/ non-missing values in the dataframe. The function returns a boolean object having the same size as that of the object on which it is applied, indicating whether each individual value is a
na value or not. All of the non-missing values gets mapped to true and missing values get mapped to false.
Note : Characters such as empty strings ” or numpy.inf are not considered NA values. (unless you set pandas.options.mode.use_inf_as_na = True).
Returns : Mask of bool values for each element in DataFrame that indicates whether an element is not an NA value
Example #1: Use
notna() function to find all the non-missing value in the datafram.
Let’s use the
dataframe.notna() function to find all the non-missing values in the dataframe.
As we can see in the output, all the non-missing values in the dataframe has been mapped to true. There is no false value as there is no missing value in the dataframe.
Example #2: Use
notna() function to find the non-missing values, when there are missing values in the dataframe.
As we can see in the output, cells which were having
na values were mapped as false and all the cells which were having non-missing values were mapped as true.
- Python | pandas.map()
- Python | Pandas TimedeltaIndex.contains
- Python | Pandas Series.get()
- Python | Pandas Index.min()
- Python | Pandas DataFrame.where()
- Python | Pandas Dataframe.iat[ ]
- Python | Pandas.to_datetime()
- Python | Pandas Series.between()
- Python | Pandas dataframe.add()
- Python | Pandas dataframe.all()
- Python | Pandas Index.all()
- Python | Pandas Index.any()
- Python | Pandas Timestamp.tz
- Python | Pandas DataFrame.abs()
- Python | Pandas dataframe.mad()
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.