Efficiently getting older versions of R packages -


a recurring question on package xx not available r version 2.xx.xx. example gplots package requires user have r 3.0 installed in order install. can older versions in archive of cran, but:

  • it not easy see version of package need specific r version.
  • you need build package source, (mild) challenge under windows.

my question following: there more effective workflow in getting older package versions match older version of r? in spirit of having different package repositories different version of ubuntu.

i know 1 option latest version of r, there might pressing reason stick version of r. example, 1 interested in repeating old experiment relies on old version of r , support packages. or 1 limited system administration.

this entirely untested (i'm running latest version of r , have no time @ moment install old version of r test out), perhaps 1 idea grab dates "archive" page package, compare date r version, , progressively try installing earlier versions, starting recent version.

something might starting point:

install_archive <- function(packagename) {   if(!require("xml"))       install.packages("xml")   if(!require("devtools"))       install.packages("devtools")   rversiondate <- as.date(paste(r.version()[c("year", "month", "day")],                                 collapse = "-"))   baseurl <- "http://cran.r-project.org/src/contrib/archive/"   u <- htmlparse(paste(baseurl, packagename, sep = ""))   doc <- readhtmltable(u, skip.rows=1:2)[[1]][2:3]   releasedate <- as.date(strptime(doc$`last modified`,                                    format="%d-%b-%y"))   closest <- which.min(rversiondate -                           releasedate[releasedate <= rversiondate])   install_url(paste(baseurl, doc$name[closest], sep = "")) }   install_archive("reshape")

from here, add @ least following things function:

  • i first try install current version (not "archive"), , if fails, move ahead.
  • in moving ahead, change which.min() line rank(), , try rank == 1, rank == 2, , on, perhaps setting maximum rank @ try.

even so, lot of "guess , check", software doing guessing , checking automatically. and, of course, same advice holds there reason it's not on cran!


Comments

Post a Comment

Popular posts from this blog

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more