Is there any way to drop duplicate columns, but replacing their values depending upon conditions like in table below, I would like to remove duplicate/second A and B columns, but want to replace the value of primary A and B (1st and 2nd column) where value is 0 but 1 in duplicate columns. Ex – In 3rd ro…
Tag: pandas
Pandas DateTime for Month
I have month column with values formatted as: 2019M01 To find the seasonality I need this formatted into Pandas DateTime format. How to format 2019M01 into datetime so that I can use it for my seasonality plotting? Thanks. Answer Use to_datetime with format parameter:
How to read all csv files from web page in a pandas data frame?
I’m trying to read all .csv files from https://github.com/CSSEGISandData/COVID-19/tree/master/csse_covid_19_data/csse_covid_19_daily_reports to a data frame. My code so far: Maybe somebody can help :D Answer Change the URL to and it should work. This gives you access to the raw csv file and not to a pag…
Converting a 3 column text file to csv in python?
I have a text file in in .txt format and I need it in .CSV format. It has 3 columns: timestamp, weight, voltage. Does anyone know a way to convert a .txt to .csv? The data I have is in this format: I can’t seem to format the above, there are 3 spaces (or a single tab) in-between values. I’ve
Regex within Pandas DataFrame – finding minimum length between characters
Edit: Updated for reproducibility I am currently working within a Pandas DataFrame, with a list of strings held within each row of a column [Column A]. I am trying to extract the minimum distance between any sublist combination of a keyword list (List B) whilst each row in the Dataframe column contains a list…
How to convert dataframe column into UTC datetime format?
I want to convert this Origin column in the dataframe data_copy to UTC datetime format There is also some data entries with 00:00:00 Time (I need to convert this also) I tried this command data_copy[“Origin”] = pd.to_datetime(data_copy[“Origin”],infer_datetime_format=True) But I am get…
Reading a CSV from a particular line
I am writing a program working on weather station’s data, and this is the CSV I get from my station: The issue is that pandas has troubles opening it. First, I had an error message that I managed to bypass by writing: Now the other issue is that the pandas file only displays the first 4 lines: The CSV c…
apply function of R in python
I have a code in R that works. But I want to re-do it in python. I use R to use apply function in order to calculate minor allele frequency. Can someone tell me how such a code would look in python? I am using pandas to read the data in python. I have read the file using pandas but
Drop Non-equivalent Multiindex Rows in Pandas Dataframe
Goal If sub-column min equals to sub-column max and if min and max sub-column do not equal to each other in any of the column (ao, his, cyp1a2s, cyp3a4s in this case), drop the row. Example Want Attempt Note The actual dataframe has 50+ columns. Answer Use DataFrame.xs for DataFrame by second levels of MultiI…
How to set value of first several rows in a Pandas Dataframe for each Group
I am a noob to groupby methods in Pandas and can’t seem to get my head wrapped around it. I have data with ~2M records and my current code will take 4 days to execute – due to the inefficient use of ‘append’. I am analyzing data from manufacturing with 2 flags for indicating problems w…