The functionSeries.value_counts()returns the count of each unique value of a series or a column. Example: We have created a DataFrame df that contains a categorical column named ‘Sex’, and ranvalue_counts()function to see the count of each unique value in that column. importpandasaspd d...
In case you want to know the count of each of the distinct values of a specific column, you can use the pandasvalue_counts()function. In the above dataframedf, if you want to know the count of each distinct value in the columnGender, you can use – # count of each unique value in...
explode会将这些列表的内容分散到每一行中，以便value_counts将它们作为单独的实体进行计数。
"UK", "GR", "JP"]) In [152]: key = countries[np.random.randint(0, 4, 1000)] In [153]: grouped = data_df.groupby(key) # Non-NA count in each group
17. Count the number of each type of animal in df.In [18] df['animal'].value_counts() dog 4 cat 4 snake 2 Name: animal, dtype: int64 18. Sort df first by the values in the 'age' in decending order, then by the value in the 'visit' column in ascending order.In...
2. Use nunique() to get Count Distinct Values in Pandas If you have SQL background you probably would have run count(distinct) to get the count of distinct values, you can achieve the same in pandas by grouping a column and then getting unique values for each group along with count. ...
nunique() Returns the number of unique values in the specified axis pct_change() Returns the percentage change between the previous and the current value pipe() Apply a function to the DataFrame pivot() Re-shape the DataFrame pivot_table() Create a spreadsheet pivot table as a DataFrame pop...
Building unique values by data type in "Describe" popup Behavior for Wide Dataframes There is currently a performance bottleneck on the front-end when loading "wide dataframes" (dataframes with many columns). The current solution to this problem is that upon initial load of these dataframes to...
In value_counts, the Series unique values become the index - hence why it feels natural that the index should inherit the Series name Member mroeschke commented Nov 4, 2022 I guess I could see an argument that value_counts is an implicit groupby-count, so for the Series case, the resu...
DataFrame.describe()函数也可以对 DataFrame 的 category 类型(非数值型)进行描述性统计,返回 count, unique, top,freq 值,分别代表记录的数量、类的数量、记录数量最多的类、记录数量最多的类的记录数量。 当我们用数值来进行分类时,进行统计分析时如果不希望作为类别的数值列也被进行统计分析,可以专门将数值类的...