languageR (version 1.0)

corsup.fnc: Supplementary rows or columns in correspondence analysis

Description

Corsup calculates supplementary rows or columns for correspondence analysis.

Usage

corsup.fnc(corres, bycol = TRUE, supp, plot = TRUE, font = 3, labels = "", 
cex = 1)

Arguments

corres

A correspondence object.

bycol

A logical value indicating whether supplementary columns (the default) or supplementary rows are required.

supp

Supplementary rows or columns from a data frame with the same structure as the data frame used for the corres object.

plot

A logical value indicating whether supplementary rows or columns should be added to an already existing plot.

font

An integer specifying the font to be used for plotting.

labels

A character vector with row or column names to be used for plotting.

cex

A real specifying the font size required for plotting.

Value

• If plot = FALSE, a matrix with the supplementary coordinates. Otherwise, supplementary rows or columns are added to an already existing plot of a correspondence object.

References

F. Murtagh (2005) Correspondence Analysis and Data Coding with JAVA and R, Chapman & Hall/CRC, Boca Raton, FL.

See Also

corres.fnc

Examples

data(oldFrench)
  data(oldFrenchMeta)
  prose = oldFrench[oldFrenchMeta$Genre=="prose" & 
          !is.na(oldFrenchMeta$Year),]
  proseinfo = oldFrenchMeta[oldFrenchMeta$Genre=="prose" & 
          !is.na(oldFrenchMeta$Year),]
  proseinfo$Period = as.factor(proseinfo$Year <= 1250)

  prose.ca = corres.fnc(prose)
  plot(prose.ca, addcol = FALSE, 
  rcol = as.numeric(proseinfo$Period) + 1, 
  rlabels = proseinfo$Year, rcex = 0.7)

  proseSup = oldFrench[oldFrenchMeta$Genre == "prose" & 
          is.na(oldFrenchMeta$Year),]
  corsup.fnc(prose.ca, bycol = FALSE, supp = proseSup, font = 2, 
  cex = 0.8, labels = substr(rownames(proseSup), 1, 4))