merge

[Solved] How to merge two CSV files by Python based on the common information in both files?

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The following script will create result.csv based on your original sample data (see past edits to question): import csv from collections import defaultdict d_entries = defaultdict(list) with open(‘fileTwo.csv’, ‘r’) as f_fileTwo: csv_fileTwo = csv.reader(f_fileTwo) header_fileTwo = next(csv_fileTwo) for cols in csv_fileTwo: d_entries[(cols[0], cols[1])].append([cols[0], ”] + cols[1:]) with open(‘fileOne.csv’, ‘r’) as f_fileOne, open(‘result.csv’, ‘w’, newline=””) as … Read more

(Solved) Two by two matching between dataframes in r

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You want the merge function. Since your column names that you want to match on already have the same name you don’t even need to do anything special. If that wasn’t the case you would want to look into the by.x and by.y parameters that merge takes. df1 = data.frame(Site.1=c(“A”,”A”,”B”),Site.2=c(“B”,”C”,”C”),Score1=c(60,70,80)) df2 = data.frame(Site.1=c(“B”,”A”,”A”),Site.2=c(“C”,”B”,”C”), Score2=c(10,20,30)) df3 … Read more