Create a vector of quadratic and cubed terms for use in linear and logistic regression

Create a vector of quadratic and cubed terms for use in linear and logistic regression

qterms(vars, nway = 2)

Arguments

vars	Variables labels to use
nway	quadratic (2) or cubic (3) term labels to create

Value

Character vector of (regression) term labels

Examples

qterms(c("a", "b"), 3)
#> [1] "I(a^2)" "I(b^2)" "I(a^3)" "I(b^3)"
qterms(c("a", "b"), 2)
#> [1] "I(a^2)" "I(b^2)"