R: Exam marks for some students

deug {ade4} | R Documentation

## Exam marks for some students

### Description

This data set gives the exam results of 104 students in the second year of a French University onto 9 subjects.

### Usage

    data(deug)

### Format

`deug` is a list of three components.

tab

  is a data frame with 104 students and 9 subjects : Algebra, Analysis, Proba, Informatic, Economy, Option1, Option2, English, Sport.

result

  is a factor of 104 components giving the final exam levels (A+, A, B, B-, C-, D).

cent

  is a vector of required marks by subject to get exactly 10/20 with a coefficient.

### Source

University of Lyon 1

### Examples

    data(deug)
    # decentred PCA
    pca1 <- dudi.pca(deug$tab, scal = FALSE, center = deug$cent, scan = FALSE)

    if(adegraphicsLoaded()) {
      g1 <- s.class(pca1$li, deug$result, plot = FALSE)
      g2 <- s.arrow(40 * pca1$c1, plot = FALSE)
      G <- superpose(g1, g2, plot = TRUE)

    } else {
      s.class(pca1$li, deug$result)
      s.arrow(40 * pca1$c1, add.plot = TRUE)
    }

[Package ade4 version 1.7-8 Index]