Grade operator: difference between two grades

Source: R/module_structure_operators.R

getRelativeGrade is an operator for grade values.

getRelativeGrade(current_grade, initial_grade)

Arguments

current_grade

a string containing the current grade in the form G?, where ? is a number.

initial_grade

a string containing the initial grade in the form G?, where ? is a number.

Value

the grade difference of the current grade relative to the initial grade.

Examples

getRelativeGrade("G4", "G3") ## 1
getRelativeGrade("G5", "G3") ## 2
getRelativeGrade("G2", "G3") ## -1