GDAtools (version 1.6)

darma: Describes Associations as in a Regression Model Analysis.

Description

Computes bivariate association measures between a response and predictor variables, producing a summary looking like a regression analysis.

Usage

darma(y, x, weights=rep(1,length(y)), target=1, twocont="kendall",
          nperm=1000, distrib="asympt", dec.a=3, dec.p=3)

Arguments

y

the response variable

x

the predictor variables

weights

an optional numeric vector of weights (by default, a vector of 1 for uniform weights)

target

rank or name of the category of interest when y is categorical

twocont

character. The type of measure of correlation measure to use between two continuous variables : "pearson", "spearman" or "kendall" (default).

nperm

numeric. Number of permutations for the permutation test of independence. If NULL, no permutation test is performed.

distrib

the null distribution of permutation test of independence can be approximated by its asymptotic distribution ("asympt", default) or via Monte Carlo resampling ("approx").

dec.a

integer. Number of decimals for association values. Default is 3.

dec.p

integer. Number of decimals for permutation p-values. Default is 3.

Value

A data frame

Details

The function computes association measures (phi, correlation coefficient, Kendall's correlation) between the variable of interest and the other variables. It can also compute the p-values permutation tests.

See Also

assoc.yx, assoc.twocat, assoc.twocont, assoc.catcont, condesc, catdesc

Examples

# NOT RUN {
  data(iris)
  iris2 = iris
  iris2$Species = factor(iris$Species == "versicolor")
  darma(iris2$Species, iris2[,1:4], target=2, nperm=100)
# }