Michael Barrowman MyKo101
MyKo101
/ multi_case_when()
Last active
July 15, 2020 00:16
Function to perform case_when() to produce multiple colums
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| food <- tibble(item=c("apple","baguette","zucchini","mushrooms")) | |
| multi_case_when <- function(.x,.names,...) { | |
| require(rlang) | |
| require(magrittr) | |
| require(purrr) | |
| .dots <- enquos(...) | |
MyKo101
/ show_function()
Created
July 15, 2020 13:17
Function to open the function in a new file editor
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| show_function <- function(fun){ | |
| tmp_dir <- tempdir() | |
| fun_expr <- enexpr(fun) | |
| if(rlang::is_call(fun_expr) && | |
| (identical(fun_expr[[1]],quote(`::`)) || identical(fun_expr[[1]],quote(`:::`)))) { | |
| fun_name <- rlang::as_name(fun_expr[[3]]) | |
| } else { | |
| fun_name <- rlang::as_name(fun_expr) | |
| } | |
MyKo101
/ datatable_subsetters
Created
August 21, 2020 23:18
`subsetters` operators for `data.tables`
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| `[[.data.table` <- function(data,subset){ | |
| subset(data,eval(subset,data)) | |
| } | |
| subsetter <- function(x){ | |
| new_subsetter(substitute(x)) | |
| } | |
| new_subsetter <- function(x){ |
MyKo101
/ mutate_s.R
Created
August 30, 2020 20:43
mutate_s() function to keep attributes during mutate()
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| mutate_s <- function(.data,...){ | |
| if(!inherits(.data,"data.frame")) stop("mutate_s() can only act on data.frames") | |
| require(rlang) | |
| .dots <- rlang::enexprs(...) | |
| lhs <- names(.dots) | |
| k <- length(.dots) | |
| p_env <- parent.frame() | |
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| #install.packages(here) | |
| #install.packages(crayon) | |
| p <- function(str){ | |
| structure(str,class=c("path","character")) | |
| } | |
| `/.path` <- function(a,b){ | |
| p(paste(a,b,sep="/")) | |
| } |
MyKo101
/ mutate_where.R
Last active
October 29, 2020 00:18
Allows for the manipulation of a subset of a data.frame based on a predicate. Similar to using `if_else()` inside `mutate()`, but also allows for the use of `across()` style mutations
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| mutate_where <- function(x,predicate,...){ | |
| full_x <- mutate(x,..row_ids = 1:n()) | |
| .predicate <- enquo(predicate) | |
| predicated_x <- filter(full_x,!!.predicate) | |
| other_x <- filter(full_x,!(!!.predicate)|is.na(!!.predicate)) | |
| mutated_x <- mutate(predicated_x,!!!enquos(...)) |
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| pseudosurv2 <- function (time, event, tmax) | |
| { | |
| if (any(is.na(time))) | |
| stop("missing values in 'time' vector") | |
| if (any(time < 0)) | |
| stop("'time' must be nonnegative") | |
| if (any(is.na(event))) | |
| stop("missing values in 'event' vector") |
MyKo101
/ Subset data.frame Rows.R
Created
November 21, 2020 15:16
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| `[[.data.frame` <- function(x,...,exact=TRUE) { | |
| na <- nargs() - !missing(exact) | |
| if (!all(names(sys.call()) %in% c("", "exact"))) | |
| warning("named arguments other than 'exact' are discouraged") | |
| if (na < 3L) | |
| { | |
| (function(x, i, exact) | |
| { | |
| if (is.matrix(i)) | |
| { |
MyKo101
/ historic_defaults.R
Created
December 28, 2020 20:15
uses remotes::install_version to get a historic account of the default arguments
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| library(rlang) | |
| library(remotes) | |
| print.historic_defaults <- function(x,...){ | |
| v_list_str <- ls(x) | |
| v_list <- as.numeric_version(v_list_str) | |
| v_list_ordered <- v_list_str[order(v_list)] | |
| for(i in 1:length(v_list_ordered)){ | |
| c_v_list <- v_list_ordered[[i]] | |
| cat("Version:",c_v_list,"\n") |
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| try_na <- function(...){ | |
| f_list <- purrr::map(list(...),rlang::as_function) | |
| f_len <- length(f_list) | |
| function(.x) { | |
| out <- rep(NA,length(.x)) | |
| i <- 1 | |
| while(any(is.na(out)) & i <= f_len){ | |
| out[is.na(out)] <- f_list[[i]](.x[is.na(out)]) | |
| i <- i + 1 | |
| } |
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