Even the old answers like piRSquared or BENY? How to help my stubborn colleague learn new ways of coding? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. How do I keep a party together when they have conflicting goals? When I try it on my actual data, I get a "TypeError: cannot convert the series to " related to the second for loop "for _ in range(df.ix[idx]['Quantity'])". [Code]-How to replicate/ copy pandas dataframe rows-pandas How to help my stubborn colleague learn new ways of coding? Making statements based on opinion; back them up with references or personal experience. How to replicate rows based on value of a column in same pandas dataframe To learn more, see our tips on writing great answers. There are two parts to the solution. I know I need to transform the dataframe, probably multiple times before I can get my desired result. Effect of temperature on Forcefield parameters in classical molecular dynamics simulations. Can a lightweight cyclist climb better than the heavier one by producing less power? It's something like the uncount in tidyr: https://tidyr.tidyverse.org/reference/uncount.html. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Making statements based on opinion; back them up with references or personal experience. Join two objects with perfect edge-flow at any stage of modelling? (think of reverse-engineering a histogram), This question doesn't have enough answers yet! Connect and share knowledge within a single location that is structured and easy to search. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Duplicate row based on value in different column, Duplicating & modifying rows in pandas based on columns condition, pandas create new column based on row value (condition), Python Dataframe how to create a new column values based on a condition, Pandas, duplicate a row based on a condition, Duplicate a row under a certain condition, Create new row in Pandas DataFrame based on conditions, Pandas - Duplicate rows based on a condition and simultaneously change a column value, Pandas - duplicate row on condition and increase only one value in row, Add a duplicate row and change the value of the duplicated row based on some other value in Pandas. for a multi-index) and also base the number of repeats on a value in a column, you can do this: This gives a DataFrame in which each record is repeated however many times is indicated in the "RepeatBasis" column. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. OverflowAI: Where Community & AI Come Together, pandas - Merge nearly duplicate rows based on column value, Behind the scenes with the folks building OverflowAI (Ep. Connect and share knowledge within a single location that is structured and easy to search. [Code]-Pandas - replicate rows with new column value from a list for How does this compare to other highly-active people in recorded history? How to find and filter Duplicate rows in Pandas - Online Tutorials Library Are arguments that Reason is circular themselves circular and/or self refuting? Could the Lightning's overwing fuel tanks be safely jettisoned in flight? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For the case wherein Interval is 0, I would like to duplicate this rows and keep the Specs value same, but only modify the Interval value and create 2 duplicate copies i.e. Adding the column simplifies the melt as well. import pandas as pd record = { Why is the expansion ratio of the nozzle of the 2nd stage larger than the expansion ratio of the nozzle of the 1st stage of a rocket? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Making statements based on opinion; back them up with references or personal experience. Why is {ni} used instead of {wo} in the expression ~{ni}[]{ataru}? 2 Answers. Each row should be repeated n times, where n is a field of each row. WW1 soldier in WW2 : how would he get caught? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, New! Sci fi story where a woman demonstrating a knife with a safety feature cuts herself when the safety is turned off. "Pure Copyleft" Software Licenses? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I wrote a package (https://github.com/pwwang/datar) that implements this API: Not the best solution, but I want to share this: you could also use pandas.reindex() and .repeat(): You can further append .reset_index(drop=True) to reset the .index. Copy to clipboard DataFrame.duplicated(subset=None, keep='first') It returns a Boolean Series with True value for each duplicated row. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Stack Overflow! datetime column of pandas multiply a number, How to add another column when looping over a dataframe, Python Pandas replicate rows in dataframe, Method chaining df. Asking for help, clarification, or responding to other answers. New! Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? Pandas Python Copy row based column value. New! For What Kinds Of Problems is Quantile Regression Useful? How do I keep a party together when they have conflicting goals? How do I select rows from a DataFrame based on column values? Apple 25-12-2023 4 NaN 1. Find centralized, trusted content and collaborate around the technologies you use most. Eliminative materialism eliminates itself - a familiar idea? Here is an example of what I'm working with: The reason I don't want to sum the "Revenue" column is because my table is the result of doing a pivot over several time periods where "Revenue" simply ends up getting listed multiple times instead of having a different value per "Use_Case". Pandas Dataframe sampling based on multiple custom column category Thanks for contributing an answer to Stack Overflow! What I would like to do is to create duplicate rows for each of the original rows in the dataframe wherein, the Interval value is 0, and have this for other Interval cases with the value of Interval changed. Explanation: left - Dataframe which has to be joined from left right - Dataframe which has to be joined from the right how - specifies the type of join. Connect and share knowledge within a single location that is structured and easy to search. Single Predicate Check Constraint Gives Constant Scan but Two Predicate Constraint does not. So new index will be created for the repeated columns 1 2 3 ''' Repeat without index ''' df_repeated = pd.concat ( [df1]*3, ignore_index=True) print(df_repeated) Why would a highly advanced society still engage in extensive agriculture? "Pure Copyleft" Software Licenses? 471 Get the row(s) which have the max value in groups using . But I would need more information on what you are actually trying to achieve. How to find the shortest path visiting all nodes in a connected graph as MILP? [Solved]-Pandas, replicate every row that have a more than one value Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, New! Each row is a booking, like this: Name Arrival Departure RoomNights Trent Cotchin 29/10/2017 2/11/2017 4 Dustin Martin 1/11/2017 4/11/2017 3 Alex Rance 2/11/2017 3/11/2017 1 I want to use python to convert so that each row becomes a roomnight. The latter could not handle MultiIndexing. import pandas as pd data = pd.read_excel('your_excel_path_goes_here.xlsx') #print(data) data.drop_duplicates(subset=["Column1"], keep="first") keep=first to instruct Python to keep the first value and remove other columns duplicate values. What is the use of explicitly specifying if a function is recursive or not? You could also assign the column names in the first line, like below: You could shorten it with loc and only repeat the index, like below: I use reset_index to replace the index with monotonic indexes (0, 1, 2, 3, 4). Would you publish a deeply personal essay about mental illness during PhD? 28 I have a dataframe of transactions. Not the answer you're looking for? Python3 Here's example code: OverflowAI: Where Community & AI Come Together, Duplicate row based on value in different column, numpy - update values using slicing given an array value, Behind the scenes with the folks building OverflowAI (Ep. How to duplicate rows of a DataFrame based on values of a specific column? from former US Fed. rev2023.7.27.43548. By default, new columns are added at the end so it becomes the last column. Below are the methods to remove duplicate values from a dataframe based on two columns. For What Kinds Of Problems is Quantile Regression Useful? 1 Answer Sorted by: 0 I would do this manually. so, the columns I want to replicate based on their value are SEPTEMBER 15, SEPTEMBER 22, and SEPTEMBER 29, and the value should be value. What is the use of explicitly specifying if a function is recursive or not? For What Kinds Of Problems is Quantile Regression Useful? It's much appreciated. What Is Behind The Puzzling Timing of the U.S. House Vacancy Election In Utah? OverflowAI: Where Community & AI Come Together, Create Duplicate Rows and Change Values in Specific Columns, Behind the scenes with the folks building OverflowAI (Ep. Is the DC-6 Supercharged? In Python's Pandas library, Dataframe class provides a member function to find duplicate rows based on all columns or some specific columns i.e. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Otherwise use the latest, based on date_made, non NaN value. Find centralized, trusted content and collaborate around the technologies you use most. I'd like to copy or duplicate the rows of a DataFrame based on the value of a column, in this case orig_qty. Why do code answers tend to be given in Python when no language is specified in the prompt? Could the Lightning's overwing fuel tanks be safely jettisoned in flight? I have allocated relevant dates to each observation in the column "relevant shocks" in lists. After this transformation I'd like a DataFrame that looks like: Note I do not really care about the index after the transformation. How to Filter Rows by Column Value. To filter DataFrame rows based on the date in Pandas using the boolean mask, we at first create boolean mask using the syntax: mask = (df['col'] > start_date) & (df['col'] <= end_date) Where start_date and end_date are both in datetime format, and they represent the start and end of the range from which data has to be filtered. Because each row represents a different location, dates are repeated. left_on - Column names to join on in the left DataFrame. Selecting rows based on particular column value using '>', '=', '=', '<=', '!=' operator. Version 5 is significantly slower because of the functions concat and sort_index, since concat copies DataFrames quadratically, which takes longer time. To learn more, see our tips on writing great answers. If I allow permissions to an application using UAC in Windows, can it hack my personal files or data? Let's see how to Select rows based on some conditions in Pandas DataFrame. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 1. Ideally, the combined row would have the average price and sum of total quantity. Can I use the door leading from Vatican museum to St. Peter's Basilica? Asking for help, clarification, or responding to other answers. Copying row values in pandas based on another row value, Trying to copy Pandas DataFrame rows X Times but different depending on a column value, Pandas Python Copy row based column value, copy over rows a specific number of times based on column value, My sink is not clogged but water does not drain. Why do code answers tend to be given in Python when no language is specified in the prompt? Ask Question Asked 5 years, 6 months ago. How to find the shortest path visiting all nodes in a connected graph as MILP? The query: '''INSERT or REPLACE into person_age (id, age) values (?,?,?) This worked. How to handle repondents mistakes in skip questions? Is it superfluous to place a snubber in parallel with a diode by default? 1291 How to add a new column to an existing DataFrame? duplicate row based on another column python, Pandas - Duplicate rows based on a condition and simultaneously change a column value, Duplicate rows according to a function of two columns. Asking for help, clarification, or responding to other answers. @zero: this should be the new accepted answer, New! Replicate X times specific rows of pandas dataframe. What Is Behind The Puzzling Timing of the U.S. House Vacancy Election In Utah? Here are some more ways to do this that are still missing and that allow chaining :), (Edit: On a more serious note, using explode is useful if you need to count replicas and have a dynamic replica count per row. repeat a row in pandas n times based on the value of other two columns. How to duplicate rows from a DataFrame based on a column in Python? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. -Big_Ears I have a question regarding duplicating rows in a pandas dataframe. How to handle repondents mistakes in skip questions? Which generations of PowerPC did Windows NT 4 run on? Sometimes a person doesn't even know where to begin and an ugly attempt at a solution just clutters the question and wastes everyone's time. I was using some code that I didn't think was optimal and eventually found jezrael's answer. score:1 Accepted answer Starting from the following dataframe, with columns Item and Group not set as Index, I have the following: Item Group 0 0001 A 1 0002 A 2 0003 B 3 0004 A items_mod = pd.DataFrame () for i in [5, 6, 7]: items ['Month'] = i items_mod = items_mod.append (items) items_mod = items_mod.sort_values ('Item') How can I replicate rows of a Pandas DataFrame? Is it unusual for a host country to inform a foreign politician about sensitive topics to be avoid in their speech? So if I have a DataFrame and using pandas==0.24.2: So in the example above the row with orig_qty=4 should be duplicated 4 times and the row with orig_qty=2 should be duplicated 2 times. To learn more, see our tips on writing great answers. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, pandas: for each row in df copy row N times with slight changes, python - Duplicate rows x number of times based on a value in a column, Pandas: Copy a value in a dataframe to multiple rows based on a condition, Pandas, copy rows whose names are repeated N times. I want to duplicate each row based on the quantity sold. For What Kinds Of Problems is Quantile Regression Useful? What would be the best way to tackle this issue? Thanks for contributing an answer to Stack Overflow! Am I betraying my professors if I leave a research group because of change of interest? rev2023.7.27.43548. How could do this? Pandas : Find duplicate rows based on all or few columns Not the answer you're looking for? If I allow permissions to an application using UAC in Windows, can it hack my personal files or data? What is the use of explicitly specifying if a function is recursive or not? ;), Versions 1 and 2 lose the dtypes: all columns get converted to. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Duplicate rows of dataframe based on condition, Repeat rows in a pandas DataFrame based on column value, python pandas data-frame - duplicate rows according to a column value, Repeating rows in a DataFrame based on a column, Repeat dataframe rows n times according to the unique column values and to each row repeat create a new column with different values, Repeating rows of a dataframe based on a column value, Duplicating rows with certain value in a column. For What Kinds Of Problems is Quantile Regression Useful? Find centralized, trusted content and collaborate around the technologies you use most. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How and why does electrometer measures the potential differences? How to display Latin Modern Math font correctly in Mathematica? Which generations of PowerPC did Windows NT 4 run on? I appreciate @Prune's advice and I generally agree with it. This is some dark magic. We will select rows from Dataframe based on column value using: Boolean Indexing method. Arguments: Frequently Asked: How can I replicate rows of a Pandas DataFrame? Create Duplicate Rows and Change Values in Specific Columns Did active frontiersmen really eat 20,000 calories a day? Making statements based on opinion; back them up with references or personal experience. Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? What is the use of explicitly specifying if a function is recursive or not? How can I identify and sort groups of text lines separated by a blank line? Relative pronoun -- Which word is the antecedent? Am I betraying my professors if I leave a research group because of change of interest? OverflowAI: Where Community & AI Come Together, Behind the scenes with the folks building OverflowAI (Ep. How to repeat certain rows of a dataframe? Could the Lightning's overwing fuel tanks be safely jettisoned in flight? I have a dataframe of transactions. My goal is to merge or "coalesce" these rows into a single row, without summing the numerical values. To learn more, see our tips on writing great answers. Accepted answer If index is default RangeIndex you can use integer division by 5 and then using GroupBy.transform with GroupBy.first: df ['UniqueNumber'] = df.groupby (df.index // 5) ['UniqueNumber'].transform ('first') Or if some general index values create helper array: How common is it for US universities to ask a postdoc to bring their own laptop computer etc.? rev2023.7.27.43548. I also varied the quantity so that one can more easily understand the problem. Asking for help, clarification, or responding to other answers. As suggested in the other answer, you want melt with a some extra cleaning, and merge: Thanks for contributing an answer to Stack Overflow! So the output should look like this: To be honest, I'm not a coder and so am trying to do this on a much larger dataset. How to help my stubborn colleague learn new ways of coding? I want to replicate rows in a Pandas Dataframe. Is it normal for relative humidity to increase when the attic fan turns on? rev2023.7.27.43548. Does anyone with w(write) permission also have the r(read) permission? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, New! Pandas duplicate rows based on column value - Stack Overflow 1 I need to do some row replication. Find centralized, trusted content and collaborate around the technologies you use most. Manga where the MC is kicked out of party and uses electric magic on his head to forget things, "Pure Copyleft" Software Licenses? In my dataset, the index was a datetime series which had some missing dates (not sure if that is relevant). Is it unusual for a host country to inform a foreign politician about sensitive topics to be avoid in their speech? How to duplicate rows of a DataFrame based on values of a specific column? Then its simply a call to .stack() and some basic filtering to complete. OverflowAI: Where Community & AI Come Together, Pandas duplicate rows based on column value, Behind the scenes with the folks building OverflowAI (Ep. My goal is to merge or "coalesce" these rows into a single row, without summing the numerical values. How to drop rows of Pandas DataFrame whose value in a certain column is NaN. where time_something is a function which times a snippet with timeit and returns the result in the above format. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. For this example, you have a simple DataFrame of random integers arrayed across two columns and 10 rows: This works like a charm for Dataframes with MultiIndex values, which did not seem to be the case with the accepted solution. This problem though does have me stumped and I haven't been able to provide a meaningful starting place for a solution. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Viewed 2k times . Why is {ni} used instead of {wo} in ~{ni}[]{ataru}? You could write a simple cleaning function to make it a list (assuming it's not a list of commas, and you can't simply use ast.literal_eval ): def clean_string_to_list (s): return [c for c in s if c not in ' [,]'] # you might need to catch errors df ['data'] = df ['data'].apply (clean_string_to_list) Iterating through the rows seems like a . I want to duplicate each row based on the quantity sold. I have a pandas dataframe with several rows that are near duplicates of each other, except for one value. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Check the other response below for a different approach as well. Are arguments that Reason is circular themselves circular and/or self refuting? Eliminative materialism eliminates itself - a familiar idea? Method 1: using drop_duplicates () Approach: We will drop duplicate columns based on two columns Let those columns be 'order_id' and 'customer_id' Keep the latest entry only Reset the index of dataframe Below is the python code for the above approach. Is it superfluous to place a snubber in parallel with a diode by default? OverflowAI: Where Community & AI Come Together, How to replicate rows based on value of a column in same pandas dataframe, Behind the scenes with the folks building OverflowAI (Ep. Thanks. One way of solving this is by creating a second dataframe with all elements which do not have Interval=0. I'll have to examine it more carefully. is there a limit of speed cops can go on a high speed pursuit? What is Mathematica's equivalent to Maple's collect with distributed option? I think data duplication is something best avoided. Can Henzie blitz cards exiled with Atsushi? Is the DC-6 Supercharged? Thanks for contributing an answer to Stack Overflow! I guess it's not the most elegant solution ever, but should work. You can use Index.repeat to get repeated index values based on the column then select from the DataFrame: Or you could use np.repeat to get the repeated indices and then use that to index into the frame: After which there's only a bit of cleaning up to do: Note that if you might have duplicate indices to worry about, you could use .iloc instead: which uses the positions, and not the index labels. Pandas - duplicate rows based on values - Stack Overflow How to handle repondents mistakes in skip questions? Well this is an intermediate step- I am generating the "v" column according to a probability distribution, and then I will add another column by randomly selecting rows from another dataset. Loops are not terribly efficient on a dataframe. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. To find and select the duplicate, all rows are based on all columns, you can use the "Dataframe.duplicated ()" without any subset argument. What is Mathematica's equivalent to Maple's collect with distributed option? How does this compare to other highly-active people in recorded history? Did active frontiersmen really eat 20,000 calories a day? A similar question (Duplicate rows based on value with condition) on SO focuses on creating duplicate rows based on condition, but not on changing the values in the dataframe corresponding to the other rows. Has these Umbrian words been really found written in Umbrian epichoric alphabet? Not the answer you're looking for? My sink is not clogged but water does not drain. I suggest you created a list of values you want to have in your new DataFrame, i.e.

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