Return Column Name of Largest Value for Each Row in R DataFrame Last Updated : 23 Sep, 2021 Comments Improve Suggest changes Like Article Like Report In this article, we will discuss how to return column names of the largest value for each row in DataFrame in R Programming Language. Example: Column1Column2Column3Max columnRow1200Column1 , Because, Column2 value and Column 3 value is less than Column1Row2435Column3 , Because, Column2 value and Column 1 value is less than Column3Row31066Column1 , Because, Column2 value and Column 3 value is less than Column1Row4954Column1 , Because, Column2 value and Column 3 value is less than Column1Row5793Column2 , Because, Column1 value and Column 3 value is less than Column2 So For this implementation we will use colnames() and max.col() functions Syntax: colnames(dataframe)[max.col(dataframe)] Here, colnames() is used to get the column namesmax.col() is used to return the maximum column name of the dataframe Example: R program to get the largest column name in all rows R # create a dataframe with 3 columns and 3 rows data = data.frame(subject1=c(91, 62, 93), subject2=c(98, 79, 70), subject3=c(100, 78, 98)) # get the largest column name in each row print(colnames(data)[max.col(data)]) Output: [1] "subject3" "subject2" "subject3" Example: R program to get the largest column name in all rows R # create a dataframe with 4 columns and 3 rows data = data.frame(subject1=c(91, 62, 93, 56, 78), subject2=c(98, 79, 70, 56, 78), subject3=c(100, 78, 98, 56, 71)) # get the largest column name in each row print(colnames(data)[max.col(data)]) Output: [1] "subject3" "subject1" "subject3" "subject1" "subject2" Comment More infoAdvertise with us Next Article Return Column Name of Largest Value for Each Row in R DataFrame M manojkumarreddymallidi Follow Improve Article Tags : R Language R Programs R-DataFrame R DataFrame-Programs Similar Reads Count number of rows within each group in R DataFrame DataFrame in R Programming Language may contain columns where not all values are unique. 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