R language uses the quantile function to calculate the quantile of the score value (20%, 40%, 60%, 80%), uses the logical operator to encode the corresponding quantile interval (quantile) into the cla

R Language use quantile Function to calculate the quantile of the scoring value （20%、40%、60%、80%）、 Use logical operators to put the corresponding quantile interval （quantile） Code to generate new fields for classification values 、 Use strsplit The function splits the student's first and last names and returns the split list

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