---
title: "Download fat data from the web"
author: "Steve Simon"
output: html_document
knit: (function(inputFile, encoding) {
  rmarkdown::render(inputFile, encoding = encoding,
  output_dir = "../results", output_format = "all") })  
---

This program was written on 2020-08-20 and last modified on `r Sys.Date()`.

This program downloads a data file from the web and stores it locally in csv format.

```{r setup}
suppressMessages(suppressWarnings(library(magrittr)))
suppressMessages(suppressWarnings(library(stringr)))
```

```{r download}
csv_name <- "../data/fat.csv"
"http://jse.amstat.org/datasets/fat.dat.txt" %>%
  readLines  %>%
  str_replace("^\\s+", "") %>%                      # Remove leading blanks
  str_replace_all("\\s+", ",") -> raw_data          # Convert multiple blanks to commas
names_raw_data <- c(
 "case_number",
 "fat_b",
 "fat_s",
 "dens",
 "age",
 "wt",
 "ht",
 "bmi",
 "ffw",
 "neck",
 "chest",
 "abdomen",
 "hip",
 "thigh",
 "knee",
 "ankle",
 "biceps",
 "forearm",
 "wrist")
names_raw_data %>%
  paste(collapse='","') %>%
  paste0('"', ., '"') %>%
  c(raw_data) -> csv_text
csv_text %>%
  writeLines(csv_name)
cat(csv_text, sep="\n")
```