sco.gauss: Relationships between one score and qualitative variables

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

Description

Draws Gauss curves with the same mean and variance as the scores of indivivuals belonging to categories of several qualitative variables.

Usage

sco.gauss(score, df, xlim = NULL, steps = 200, ymax = NULL, sub =
names(df), csub = 1.25, possub = "topleft", legen =TRUE, label = row.names(df),
clabel = 1, grid = TRUE, cgrid = 1, include.origin = TRUE, origin = c(0, 0))

Arguments

score	a numeric vector
df	a dataframe containing only factors, number of rows equal to the length of the score vector
xlim	starting point and end point for drawing the Gauss curves
steps	number of segments for drawing the Gauss curves
ymax	max ordinate for all Gauss curves. If NULL, ymax is computed and different for each factor
sub	vector of strings of characters for the lables of qualitative variables
csub	character size for the legend
possub	a string of characters indicating the sub-title position ("topleft", "topright", "bottomleft", "bottomright")
legen	if TRUE, the first graphic of the series displays the score with evenly spaced labels (see sco.label)
label	labels for the score
clabel	a character size for the labels, used with par("cex")*clabel
grid	a logical value indicating whether a grid in the background of the plot should be drawn
cgrid	a character size, parameter used with par("cex")*cgrid to indicate the mesh of the grid
include.origin	a logical value indicating whether the point "origin" should belong to the plot
origin	the fixed point in the graph space, for example c(0,0) the origin axes

Details

Takes one vector containing quantitative values (score) and one dataframe containing only factors that give categories to wich the quantitative values belong. Computes the mean and variance of the values in each category of each factor, and draws a Gauss curve with the same mean and variance for each category of each factor. Can optionaly set the start and end point of the curves and the number of segments. The max ordinate (ymax) can also be set arbitrarily to set a common max for all factors (else the max is different for each factor).

Value

The matched call.

Author(s)

Jean Thioulouse, Stephane Dray [e-mail]

Examples

data(meau)
envpca <- dudi.pca(meau$env, scannf=FALSE)
dffac <- cbind.data.frame(meau$design$season, meau$design$site)
sco.gauss(envpca$li[,1], dffac, clabel = 2, csub = 2)

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