Nothing
# .fixest -----------------------
#' @export
model_parameters.fixest <- function(model,
ci = 0.95,
ci_method = NULL,
bootstrap = FALSE,
iterations = 1000,
standardize = NULL,
exponentiate = FALSE,
p_adjust = NULL,
summary = getOption("parameters_summary", FALSE),
keep = NULL,
drop = NULL,
verbose = TRUE,
vcov = NULL,
vcov_args = NULL,
...) {
# default ci-method, based on statistic
if (is.null(ci_method)) {
if (identical(insight::find_statistic(model), "t-statistic")) {
ci_method <- "wald"
} else {
ci_method <- "normal"
}
}
# extract model parameters table, as data frame
out <- tryCatch(
{
.model_parameters_generic(
model = model,
ci = ci,
ci_method = ci_method,
bootstrap = bootstrap,
iterations = iterations,
merge_by = "Parameter",
standardize = standardize,
exponentiate = exponentiate,
p_adjust = p_adjust,
summary = summary,
keep_parameters = keep,
drop_parameters = drop,
vcov = vcov,
vcov_args = vcov_args,
verbose = verbose,
...
)
},
error = function(e) {
NULL
}
)
if (is.null(out)) {
insight::format_error("Something went wrong... :-/")
}
attr(out, "object_name") <- insight::safe_deparse_symbol(substitute(model))
out
}
#' @export
standard_error.fixest <- function(model, vcov = NULL, vcov_args = NULL, ...) {
params <- insight::get_parameters(model)
if (!is.null(vcov)) {
# we don't want to wrap this in a tryCatch because the `fixest` error is
# informative when `vcov` is wrong.
V <- insight::get_varcov(model, vcov = vcov, vcov_args = vcov_args)
SE <- sqrt(diag(V))
} else {
stats <- summary(model)
SE <- as.vector(stats$se)
}
.data_frame(
Parameter = params$Parameter,
SE = SE
)
}
#' @export
degrees_of_freedom.fixest <- function(model, method = "wald", ...) {
# fixest degrees of freedom can be tricky. best to use the function by the
# package.
insight::check_if_installed("fixest")
if (is.null(method)) {
method <- "wald"
}
method <- match.arg(
tolower(method),
choices = c("wald", "residual", "normal")
)
# we may have Inf DF, too
if (method == "normal") {
return(Inf)
}
method <- switch(method,
wald = "t",
residual = "resid"
)
fixest::degrees_freedom(model, type = method)
}
# .feglm -----------------------
#' @export
model_parameters.feglm <- model_parameters.fixest
#' @export
standard_error.feglm <- function(model, ...) {
stats <- stats::coef(summary(model))
params <- insight::get_parameters(model)
.data_frame(
Parameter = params$Parameter,
SE = as.vector(stats[, "Std. error"])
)
}
## TODO add ci_method later?
#' @export
p_value.feglm <- function(model, ...) {
stats <- stats::coef(summary(model))
params <- insight::get_parameters(model)
.data_frame(
Parameter = params$Parameter,
p = as.vector(stats[, 4])
)
}
# .fixest_multi -----------------------------------
#' @export
model_parameters.fixest_multi <- function(model,
ci = 0.95,
ci_method = NULL,
bootstrap = FALSE,
iterations = 1000,
standardize = NULL,
exponentiate = FALSE,
p_adjust = NULL,
summary = getOption("parameters_summary", FALSE),
keep = NULL,
drop = NULL,
verbose = TRUE,
vcov = NULL,
vcov_args = NULL,
...) {
# iterate over responses
out <- lapply(
model,
model_parameters.default,
ci = ci,
ci_method = ci_method,
bootstrap = bootstrap,
iterations = iterations,
standardize = standardize,
exponentiate = exponentiate,
p_adjust = p_adjust,
summary = summary,
keep = keep,
drop = drop,
verbose = verbose,
vcov = vcov,
vcov_args = vcov_args,
...
)
# bind lists together to one data frame, save attributes
att <- attributes(out[[1]])
params <- do.call(rbind, out)
# add response and group columns
id_columns <- .get_fixest_multi_columns(model)
params$Response <- id_columns$Response
params$Group <- id_columns$Group
attributes(params) <- utils::modifyList(att, attributes(params))
attr(params, "model_class") <- "fixest_multi"
params
}
#' @export
ci.fixest_multi <- function(x, ...) {
out <- do.call(rbind, lapply(x, ci, ...))
# add response and group columns
id_columns <- .get_fixest_multi_columns(x)
# add response column
out$Response <- id_columns$Response
out$Group <- id_columns$Group
row.names(out) <- NULL
out
}
#' @export
standard_error.fixest_multi <- function(model, ...) {
out <- do.call(rbind, lapply(model, standard_error, ...))
# add response and group columns
id_columns <- .get_fixest_multi_columns(model)
# add response column
out$Response <- id_columns$Response
out$Group <- id_columns$Group
row.names(out) <- NULL
out
}
#' @export
degrees_of_freedom.fixest_multi <- function(model, ...) {
out <- do.call(rbind, lapply(model, degrees_of_freedom, ...))
# add response and group columns
id_columns <- .get_fixest_multi_columns(model)
# add response column
out$Response <- id_columns$Response
out$Group <- id_columns$Group
row.names(out) <- NULL
out
}
#' @export
p_value.fixest_multi <- function(model, ...) {
out <- do.call(rbind, lapply(model, p_value, ...))
# add response and group columns
id_columns <- .get_fixest_multi_columns(model)
# add response column
out$Response <- id_columns$Response
out$Group <- id_columns$Group
row.names(out) <- NULL
out
}
#' @export
simulate_model.fixest_multi <- function(model, ...) {
lapply(model, simulate_model, ...)
}
# helper ---------------------------------
.get_fixest_multi_columns <- function(model) {
# add response and group columns
s <- summary(model)
l <- lengths(lapply(s, stats::coef))
parts <- strsplit(names(l), ";", fixed = TRUE)
id_columns <- Map(function(i, j) {
if (length(j) == 1 && startsWith(j, "rhs")) {
data.frame(
Group = rep(insight::trim_ws(sub("rhs:", "", j, fixed = TRUE)), i),
stringsAsFactors = FALSE
)
} else if (length(j) == 1 && startsWith(j, "lhs")) {
data.frame(
Response = rep(insight::trim_ws(sub("lhs:", "", j, fixed = TRUE)), i),
stringsAsFactors = FALSE
)
} else {
data.frame(
Response = rep(insight::trim_ws(sub("lhs:", "", j[1], fixed = TRUE)), i),
Group = rep(insight::trim_ws(sub("rhs:", "", j[2], fixed = TRUE)), i),
stringsAsFactors = FALSE
)
}
}, unname(l), parts)
do.call(rbind, id_columns)
}
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