Nothing
translate_graph_func <- function(gf_xml) {
ypts_xml <- gf_xml %>% xml2::xml_find_first(".//d1:ypts")
ypts <- xml2::xml_text(ypts_xml) %>%
stringr::str_split(",", simplify = TRUE) %>% as.vector %>% as.numeric()
length_y <- length(ypts)
xscale_xml <- gf_xml %>% xml2::xml_find_first(".//d1:xscale")
x_min <- xml2::xml_attr(xscale_xml, "min") %>% as.numeric()
x_max <- xml2::xml_attr(xscale_xml, "max") %>% as.numeric()
x_points <- seq(x_min, x_max, length.out = length_y)
graph_fun <- stats::approxfun(
x = x_points,
y = ypts,
method = "linear",
yleft = ypts[[1]],
yright = ypts[[length_y]])
}
translate_Vensim_graph_func <- function(equation){
match_output <- stringr::str_match(
equation, "WITHLOOKUP\\((\\w+),\\(\\[.+\\],(.+)\\)\\)")
match_data_points <- match_output[[3]] %>%
stringr::str_match_all("\\((.+?),(.+?)\\),")
x_points <- match_data_points[[1]][, 2] %>% as.numeric()
y_points <- match_data_points[[1]][, 3] %>% as.numeric()
graph_fun <- stats::approxfun(
x = x_points,
y = y_points,
method = "linear",
yleft = y_points[[1]],
yright = y_points[[length(y_points)]])
list(input = match_output[[2]],
graph_fun = graph_fun)
}
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