jato | Jato , an open source implementation of the JVM | Bytecode library

Comparing two Dataframes // Deciphering one Dataframe with another

Hello everyone and thanks for the help!

I have two dataframes. The first (df1) contains all my data, including a column with a long list of abbreviations (df1[ab]) which i want to translate into numbers via the second dataframe (df2). df2 contains two columns, one column with the same abbreviations (df2[key]) and one column with the related numbers (df2[value]).

My goal is to use the second dataframe as a deciphering tool for the first. I want to compare df1[ab] with df2[key] and create a new column in df1 which contains the correct numbers from df2[value] in the right order. Since the real list of abbreviations is quite long, i dont want to use a large number of "if-statements" to complete this task.

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