flodel

library(plyr)
library(XML)

# build a vector of URL pages we'll want to use
urls <- paste("http://crantastic.org/popcon?page=", 1:10, sep = "")

# scrape all the data from the URLs into one big data.frame
packages.df <- ldply(urls, function(url)readHTMLTable(url)[[1]])

# turn the "Users" column from factor to numeric

flodel

library(wordcloud)
wordcloud(packages.df$`Package Name`,
          packages.df$Users,
          max.words = 50,
          colors = brewer.pal(9, "Greens")[4:9])

flodel

image.gallery <- function(url, ncol = 3L) {

## This function reformats the contents of a Craigslist search result URL
## into an image gallery, opened into the default browser
##
## Inputs:
##    - url:  a Craigslist search URL as created by search.url
##    - ncol: the number of columns for the output image gallery
##
## Output: none. As a side effect, a browser is opened.

flodel

optical.art <- function(P, N, colors = brewer.pal(P, "Greys")) {

## This function creates an Op art figure as can be found on
## http://r-de-jeu.blogspot.com/
##
## Inputs:
##    - P: (integer) number of starting points
##    - N: (integer) number of semi-lines starting from each point.
##                   For best results, N should be a multiple of P 
##    - colors:      vector of colors for filling polygons.

flodel

decode <- function(x, search, replace, default = NULL) {

    # build a nested ifelse function by recursion
    decode.fun <- function(search, replace, default = NULL)
        if (length(search) == 0L) {
            function(x) if (is.null(default)) x else rep(default, length(x))
        } else {
            function(x) ifelse(x == search[1L], replace[1L],
                                                decode.fun(tail(search,  -1L),
                                                           tail(replace, -1L),

flodel

basket <- c("apple", "banana", "lemon", "orange",
            "orange", "pear", "cherry")
ifelse(basket == "banana", "apple",
ifelse(basket == "orange", "pineapple",
       basket))   # or "fig"))
# [1] "apple"  "apple"  "lemon"  "pineapple"
# [4] "pineapple"   "pear"   "cherry"

flodel

decode(basket, search  = c("banana", "orange"),
               replace = c("apple", "pineapple"))
# [1] "apple"   "apple"   "lemon"   "pineapple"   "pineapple"   "pear"   "cherry"   

decode(basket, search  = c("banana", "orange"),
               replace = c("apple", "pineapple"),
               default = "fig")
# [1] "fig"   "apple"   "fig"   "pineapple"   "pineapple"   "fig"   "fig"  

flodel

ok.comma <- function(FUN) {
  function(...) {
    arg.list <- as.list(sys.call())[-1L]
    len <- length(arg.list)
    if (len > 1L) {
      last <- arg.list[[len]]
      if (missing(last)) {
        arg.list <- arg.list[-len]
      }
    }

flodel

#############################################################################
## DOWNLOAD and PARSE data

base_url <- "http://trackshackresults.com/peachtree/results/2015/ptresults.php"

divisions_map <- read.table(text = '
                            
                            Ind   Div     Division              
                            1     1B     "****MEN -- OPEN****"
                            2     1G   "****WOMEN -- OPEN****"