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Is the name "Julia" anything to do with Julia sets in mathematics?
No. See this post on the mailing list:
Steven G. Johnson
Alan Edelman told me specifically that it was not named after the fractal, and in fact that "Julia" doesn't refer to anything in particular. Apparently, it just came up in a random conversation years ago when someone suggested arbitrarily that "Julia" would be a good name for a programming language.
and on quora:
Jeff Bezanson's friend suggested it, and they just went along with the name.
This quora post also mentions that this is again stated by Jeff and Stefan on video, which I think is this one (though there is no transcript, I also recall the same thing).
Related
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In a package, I want to aknowledge someone's intellectual help, who has writen no code.
The question is about the best way to credit this help, as I don't find a role of persons who fits with this case.
In ?person, and "Who Did What" (The R Journal) the person's role closer to what I am looking for are:
"ctb" (Contributor): Authors who have made smaller contributions (such as code patches, etc) ...
"ths" (Thesis advisor): Thesis advisor ...
But the person whose help I want to aknowledge has writen no code, and this is not a thesis
The answer has came from the link provided by #Axeman with the full list of roles:
Consultant [csl]
A person or organization relevant to a resource, who is called upon for professional advice or services in a specialized field of knowledge or training
Consultant to a project [csp]
A person or organization relevant to a resource, who is engaged specifically to provide an intellectual overview of a strategic or operational task and by analysis, specification, or instruction, to create or propose a cost-effective course of action or solution
The question has been put on hold, if it is reopen I would like #Axeman to make his comment as an answer, to accept it.
If it is considered proper by someone with enough reputation, it could be tagged as persons, credit or attribution.
Regards.
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I have done some searching around the Internet and SO looking for an introduction or analysis of what makes data.table so fast, but I've only found a lot of (very helpful) manuals, no breakdown of what goes into the programming. (I am more or less completely floored that I can't locate a published paper for data.table, not even something from JStatSoft.)
I've had an algorithms class so I know about sorts and linked lists and binary trees and such, but I don't want to make any amateur guesses (especially when I go to explain to academic people why it's a good idea to use it). Can anyone offer a short, topical summary with references? This question references a slide presentation which is cool, but the info comes in pieces (and even the documentation for, say, setkey() doesn't cite a data.table reference, but goes to Wikipedia).
What I am looking for is something that is both not the source code and not a list of Wikipedia topics, but an ideally "official", sourced answer (thus making it canonical, which could help a lot with all the questions orbiting around this topic).
(It would be great if there was a technical paper out there I could cite for this (the citation() for data.table is just the manual, but of course it's not directly relevant to the question as far as SO is concerned.)
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Myrrix was recently purchased by Cloudera. Will Myrrix become part of the Cloudera platform? Is there any estimate for when that will occur? Will there be a charge for the use of Myrrix in the future?
Thanks!
(This is off topic for SO, and better asked at https://getsatisfaction.com/myrrix)
The current Myrrix code base is end-of-lifed and will be unsupported after December 31, 2013.
Internally we are building a newer project from the code base, however. It may be open-sourced quite soon in fact, but I do not want to commit to anything.
Watch https://getsatisfaction.com/myrrix or the Myrrix mailing list for news.
PS the successor is Oryx and was released last October.
https://github.com/cloudera/oryx
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Are there any websites or blogs with programming challenges specifically for R users?
I don't know of any specifically for R users. But you'll find a good number of R entries on the Project Euler challenge. See this blog, for example:
http://www.theresearchkitchen.com/blog/archives/category/project-euler
I don't know about any specific to R, but there are quite a few questions tagged code-golf, here on Stack Overflow. Many of them are language agnostic, but not all.
Another area of the site that I like to visit are the questions tagged rosetta-stone. Those questions specifically ask for answers from every programming language.
I haven't heard of any, but you could visit some math-oriented challenges, where you can solve problems in any programming language you wish. One I know is http://projecteuler.net
Bah, someone was faster ;). A thing to be added: after you solve a riddle there, you can see others posts on it, many people submit they code, I saw some R code there afair.
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today I was looking for a free collaborative code editor for Mac OS X, I don't really need it but I find the idea pretty charming. So I want to know you opinion about that: is there someone in real world who is using a collaborative code editor and gets some benefits out of it?
We use it over the Internet when discussing code via Chat/VoIP. Something along:
A: "If we change this to be an Integer the function gets much simpler" (Edit)
B: "Niftiy, but then we have to change it here, too" (Edit)
A: ...
If you're pairs programming it is very useful. The approach can be discussed and everyone can drive when they have ideas. I can't say I've had the privilege of using this at work.
I've found it fairly useful when putting together packing/todo/etc lists with my wife while at work. We use google docs, which isn't quite realtime, but it is definitely better than emailing back and forth throughout the day.