Nothing
has_re <- function(formula) {
length(lme4::findbars(formula[[length(formula)]])) > 0L
}
find_dim_in_dir <- function(x, i) {
d <- length(dim(x))
if(d == 0 && i == 1) {
# have a vector
return(length(x))
} else if(d < i) {
stop(paste0("Array does not have dimension ", i), call. = FALSE)
} else {
return(dim(x)[i])
}
}
subset_dim <- function(x, i, indices){
d <- length(dim(x))
if(d == 0 && i == 1) {
# have a vector
return(x[indices])
}
if(d < i) {
stop(paste0("Array does not have dimension ", i), call. = FALSE)
}
if(i > 1L) {
commas_before <- paste(rep(",", times = i - 1), collapse = " ")
} else {
commas_before <- character(0)
}
if(i < d) {
commas_after <- paste(rep(",", times = d - i), collapse = " ")
} else {
commas_after <- character(0)
}
expr_text <- paste("x[", commas_before, "indices", commas_after,
", drop = FALSE]")
eval(parse(text = expr_text))
}
# copied from terms.formula
# stop dropping of brackets around (1 | group) terms
fixFormulaObject <- function(object) {
Terms <- terms(object)
tmp <- attr(Terms, "term.labels")
ind <- grep("|", tmp, fixed = TRUE)
if (length(ind))
tmp[ind] <- paste("(", tmp[ind], ")")
if (length(ind <- attr(Terms, "offset"))) {
tmp2 <- as.character(attr(Terms, "variables"))[-1L]
tmp <- c(tmp, tmp2[ind])
}
rhs <- if (length(tmp))
paste(tmp, collapse = " + ")
else "1"
if (!attr(terms(object), "intercept"))
rhs <- paste(rhs, "- 1")
if (length(form <- formula(object)) > 2L) {
res <- formula(paste("lhs ~", rhs))
res[[2L]] <- form[[2L]]
res
}
else formula(paste("~", rhs))
}
find_pairs <- function(set) {
if(length(set) > 1L) {
return(utils::combn(set, m = 2, simplify = FALSE))
} else {
return(NULL)
}
}
check_weights <- function(weights) {
tol <- .Machine$double.eps^0.5
if(length(weights) > 0) {
weights_are_integers <- all(abs(weights - round(weights)) < tol)
if(!weights_are_integers)
stop("Cannot currently handle non-integer weights", call. = FALSE)
}
}
check_modfr_SR <- function(modfr) {
family <- modfr$family$family
link <- modfr$family$link
if(family != "binomial")
stop("Only binomial family currently implemented for sequential reduction approximation",
call. = FALSE)
if(!link %in% c("logit", "probit"))
stop("Only logit and probit links currently implemented for sequential reduction approximation",
call. = FALSE)
}
is_canonical <- function(family) {
canonical_link <- eval(parse(text = paste(family$family, "()", sep = "")))$link
family$link == canonical_link
}
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