# bertin: Make Bertin display of grid data. In markheckmann/OpenRepGrid: Tools to Analyze Repertory Grid Data

## Description

One of the most popular ways of displaying grid data has been adopted from Bertin's (1974) graphical proposals, which have had an immense influence onto data visualization. One of the most appealing ideas presented by Bertin is the concept of the reordable matrix. It is comprised of graphical displays for each cell, allowing to identify structures by eye-balling reordered versions of the data matrix (see Bertin, 1974). In the context of repertory grids, the display is made up of a simple colored rectangle where the color denotes the corresponding score. Bright values correspond to low, dark to high scores. For an example of how to analyze a Bertin display see e.g. Dick (2000) and Raeithel (1998).

## Usage

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22``` ```bertin( x, colors = c("white", "black"), showvalues = TRUE, xlim = c(0.2, 0.8), ylim = c(0, 0.6), margins = c(0, 1, 1), cex.elements = 0.7, cex.constructs = 0.7, cex.text = 0.6, col.text = NA, border = "white", lheight = 0.75, id = c(T, T), cc = 0, cr = 0, cc.old = 0, cr.old = 0, col.mark.fill = "#FCF5A4", print = TRUE, ... ) ```

## Arguments

 `x` `repgrid` object. `colors` Vector. Two or more colors defininig the color ramp for the bertin (default `c("white", "black")`). `showvalues` Logical. Wether scores are shown in bertin `xlim` Vector. Left and right limits inner bertin (default `c(.2, .8)`). `ylim` Vector. Lower and upper limits of inner bertin default(`c(.0, .6)`). `margins` Vector of length three (default `margins=c(0,1,1)`). 1st element denotes the left, 2nd the upper and 3rd the right margin in npc coordinates (i.e. 0 to zero). `cex.elements` Numeric. Text size of element labels (default `.7`). `cex.constructs` Numeric. Text size of construct labels (default `.7`). `cex.text` Numeric. Text size of scores in bertin cells (default `.7`). `col.text` Color of scores in bertin (default `NA`). By default the color of the text is chosen according to the background color. If the background ist bright the text will be black and vice versa. When a color is specified the color is set independetn of background. `border` Border color of the bertin cells (default `white`). `lheight` Line height for constructs. `id` Logical. Wheteher to print id number for constructs and elements respectively (default `c(T,T)`). `cc` Numeric. Current column to mark. `cr` Numeric. Current row to mark. `cc.old` Numeric. Column to unmark. `cr.old` Numeric. Row to unmark. `col.mark.fill` Color of marked row or column (default `"#FCF5A4"`). `print` Print whole bertin. If `FALSE` only current and old row and column are printed. `...` Optional arguments to be passed on to `bertinBase`.

## Value

`NULL` just for the side effects, i.e. printing.

## References

Bertin, J. (1974). Graphische Semiologie: Diagramme, Netze, Karten. Berlin, New York: de Gruyter.

Dick, M. (2000). The Use of Narrative Grid Interviews in Psychological Mobility Research. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research, 1(2).

Raeithel, A. (1998). Kooperative Modellproduktion von Professionellen und Klienten - erlauetert am Beispiel des Repertory Grid. Selbstorganisation, Kooperation, Zeichenprozess: Arbeiten zu einer kulturwissenschaftlichen, anwendungsbezogenen Psychologie (pp. 209-254). Opladen: Westdeutscher Verlag.

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14``` ```## Not run: bertin(feixas2004) bertin(feixas2004, c("white", "darkblue")) bertin(feixas2004, showvalues=F) bertin(feixas2004, border="grey") bertin(feixas2004, cex.text=.9) bertin(feixas2004, id=c(F, F)) bertin(feixas2004, cc=3, cr=4) bertin(feixas2004, cc=3, cr=4, col.mark.fill="#e6e6e6") ## End(Not run) ```

markheckmann/OpenRepGrid documentation built on April 30, 2021, 2:33 a.m.