foucart: K-tables Correspondence Analysis with the same rows and the...

In ade4: Analysis of Ecological Data : Exploratory and Euclidean Methods in Environmental Sciences

Description

K tables have the same rows and the same columns.
Each table is transformed by P = X/sum(X). The average of P is computing.
A correspondence analysis is realized on this average.
The initial rows and the initial columns are projected in supplementary elements.

Usage

foucart(X, scannf = TRUE, nf = 2)
## S3 method for class 'foucart'
plot(x, xax = 1, yax = 2, clab = 1, csub = 2, 
    possub = "bottomright", ...) 
## S3 method for class 'foucart'
print(x, ...) 

Arguments

X	a list of data frame where the row names and the column names are the same for each table
scannf	a logical value indicating whether the eigenvalues bar plot should be displayed
nf	if scannf FALSE, an integer indicating the number of kept axes

x	an object of class 'foucart'
xax	the column number of the x-axis
yax	the column number of the y-axis
clab	if not NULL, a character size for the labels, used with par("cex")*clab
csub	a character size for the legend, used with par("cex")*csub
possub	a string of characters indicating the sub-title position ("topleft", "topright", "bottomleft", "bottomright")
...	further arguments passed to or from other methods

Value

foucart returns a list of the classes 'dudi', 'coa' and 'foucart'

call	origine
nf	axes-components saved
rank	rank
blo	useful vector
cw	vector: column weights
lw	vector: row weights
eig	vector: eigen values
tab	data.frame: modified array
li	data.frame: row coordinates
l1	data.frame: row normed scores
co	data.frame: column coordinates
c1	data.frame: column normed scores
Tli	data.frame: row coordinates (each table)
Tco	data.frame: col coordinates (each table)
TL	data.frame: factors for Tli
TC	data.frame: factors for Tco

Author(s)

P. Bady [e-mail]
Anne B Dufour [e-mail]

References

Foucart, T. (1984) Analyse factorielle de tableaux multiples, Masson, Paris.

Examples

data(bf88)
fou1 <- foucart(bf88, scann = FALSE, nf = 3)
fou1
plot(fou1)

data(meaudret)
l1 <- split(meaudret$spe, meaudret$design$season)
l1 <- lapply(l1, function(x) 
    {row.names(x) <- paste("Sit",1:5,sep="");x})
fou2 <- foucart(l1, scan = FALSE)

if(adegraphicsLoaded()) {
  kplot(fou2, row.plabels.cex = 2)
} else {
  kplot(fou2, clab.r = 2)
}

Example output

Foucart's  COA
class: foucart coa dudi
$call: foucart(X = bf88, scannf = FALSE, nf = 3)
table  number: 6 

$nf: 3 axis-components saved
$rank: 3
eigen values: 0.5278 0.3591 0.3235
blo    vector       6      blocks
 vector length mode    content       
 $cw    4      numeric column weights
 $lw    79     numeric row weights   
 $eig   3      numeric eigen values  

 data.frame nrow ncol content             
 $tab       79   4    modified array      
 $li        79   3    row coordinates     
 $l1        79   3    row normed scores   
 $co        4    3    column coordinates  
 $c1        4    3    column normed scores

     **** Intrastructure ****

 data.frame nrow ncol content                     
 $Tli       474  3    row coordinates (each table)
 $Tco       24   3    col coordinates (each table)
 $TL        474  2    factors for Tli             
 $TC        24   2    factors for Tco             

ade4 documentation built on May 2, 2019, 5:50 p.m.