RVAideMemoire (version 0.9-7)

lr.multcomp: Comparison of simple linear least rectangles regression lines

Description

Compare confidence intervals of parameters of several simple linear least rectangles regression lines. No test is performed, the function just compares confidence intervals and return 'equal' or 'unequal'.

Usage

lr.multcomp(formula, data=NULL, conf.level = 0.95)

Arguments

formula

a formula of the form y ~ x | f, where y and x give the y and x variable, respectively, and f is a factor giving levels to be compared.

data

an optional data frame containing the variables in the formula formula. By default the variables are taken from environment(formula).

conf.level

confidence level.

Value

• data
  variables name.
• conf.level
  confidence level.
• n.reg
  number of regression lines.
• intercepts
  intercept and confidence interval of each regression line.
• slopes
  slope and confidence interval of each regression lines.
• comp
  data frame of results.

See Also

least.rect

Examples

x<-rep(1:30,3)
y<-c(1:30+rnorm(30,0,3),seq(10,35,25/29)+rnorm(30,0,3),seq(-27,0,27/29)+rnorm(30,0,3))
factor<-as.factor(rep(LETTERS[1:3],each=30))
lr.multcomp(y~x|factor)