Webpandas.DataFrame.filter — pandas 1.5.3 documentation pandas.DataFrame.filter # DataFrame.filter(items=None, like=None, regex=None, axis=None) [source] # Subset the dataframe rows or columns according to the specified index labels. Note that this routine does not filter a dataframe on its contents. The filter is applied to the labels of the index. WebFeb 5, 2024 · You can use value_counts () to get the rows in a DataFrame with their original indexes where the values in for a particular column appear more than once with Series manipulation freq = DF ['attribute'].value_counts () items = freq [freq>1].index # items that appear more than once more_than_1_df = DF [DF ['attribute'].isin (items) …
pandas - Python: Removing Rows on Count condition - Stack Overflow
WebJun 11, 2024 · Here's one way that uses a boolean mask to select names with two unique seen values: mask = df.groupby ('name').seen.nunique ().eq (2) names = mask [mask].index df [df ['name'].isin (names)] name location seen 0 max park True 1 max home False 2 max somewhere True Share Improve this answer Follow edited Jun 12, 2024 at … WebNow we have a new column with count freq, you can now define a threshold and filter easily with this column. df[df.count_freq>1] Solutions with better performance should be GroupBy.transform with size for count per groups to Series with same size like original df , so possible filter by boolean indexing : galpharm instants
pandas.DataFrame.count — pandas 2.0.0 documentation
WebMay 27, 2015 · You can assign the result of this filter and use this with isin to filter your orig df: In [129]: filtered = df.groupby ('positions') ['r vals'].filter (lambda x: len (x) >= 3) df [df ['r vals'].isin (filtered)] Out [129]: r vals positions 0 1.2 1 1 1.8 2 2 2.3 1 3 1.8 1 6 1.9 1 You just need to change 3 to 20 in your case WebNov 19, 2012 · Here are some run times for a couple of the solutions posted here, along with one that was not (using value_counts()) that is much faster than the other solutions:. Create the data: import pandas as pd import numpy as np # Generate some 'users' np.random.seed(42) df = pd.DataFrame({'uid': np.random.randint(0, 500, 500)}) # Prove … WebOct 1, 2024 · Method 1: Selecting rows of Pandas Dataframe based on particular column value using ‘>’, ‘=’, ‘=’, ‘<=’, ‘!=’ operator. Example 1: Selecting all the rows from the … black clover batch download