Answers for "access matrix row column r"

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get matrix row name r

> grades_matrix
             Math      Science          Art
Student_1      90           88           75
Student_2      78           81           95 
Student_3      84           85           83

> rownames(grade_matrix)[2]
[1] "Student_2"

> colnames(grade_matrix)[3]
[1] "Art"

Posted by: Guest on August-16-2020

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