Profile

Cover photo
David Ellis
Attended Texas Tech
Lives in San Antonio
2,135 followers|30,482 views
AboutPostsPhotosVideos+1'sReviews

Stream

David Ellis

Shared publicly  - 
 
Recently, Quandl interviewed a senior quantitative portfolio manager at a large hedge fund. We spoke about how she builds trading strategies–how she transitions from an abstract representation of the market to something concrete with genuine predictive powers. Can you tell us how you design new trading strategies? It all starts with a hypothesis. I Continue Reading
1

David Ellis

Shared publicly  - 
 
Stitch Fix is a full-stack startup creating unique solutions in data-driven merchandising, massively scaled personal styling, and complex logistics.
1

David Ellis

Shared publicly  - 
 
Movie industry lobbyists at the MPAA are trying to resurrect SOPA-style web censorship via a back door. Let's defeat online censorship again. Tell the MPAA to kill the #ZombieSOPA. https://takeaction.withgoogle.com/g-stop-mpaa
1

David Ellis

Shared publicly  - 
 
Ah ha! It turns out that the reason bootstrap samples have to be the same size as the original sample is to ensure independence.
Confidence Intervals Based on Resampling
1

David Ellis

Shared publicly  - 
1

David Ellis

Shared publicly  - 
 
Just when we thought the absurdity that marks every single day of Obama's reign could not possibly be surpassed, we learned that 4 hours (3 hours and 47 minutes to be precise) after the US president vowed to sign a new law banning bulk data collection by the NSA (named, for purely grotesque reasons, the "USA Freedom Act"), the Obama administration asked the secret Fisa surveillance court to ignore a federal court that found bulk surveillance ille...
1

David Ellis

Shared publicly  - 
2
Misty Pierce's profile photo
 
Truth!

David Ellis

Shared publicly  - 
 
A basic mantra in statistics and data science is correlation is not causation, meaning that just because two things appear to be related to
1

David Ellis

Shared publicly  - 
 
The Constitution designs a system of checks and balances for our nation, and executive amnesty for illegal immigrants unilaterally decreed from the White House would seriously undermine the rule of law. Our founders repeatedly warned about the dangers of unlimited power within the executive branch; Congress should heed those words as the President...
1

David Ellis

Shared publicly  - 
 
Rambles around computer science. Diverting trains of thought, wasting precious time. Tue, 07 Oct 2014. Seven deadly sins of talking about “types”. My essay “In Search of Types” attempts to be a dispassionate review of some of the different concepts, purposes and attitudes surrounding the word ...
1

David Ellis

Shared publicly  - 
 
This is my support/on-call week. Someone needs to invent a 5-Hour Energy for morale, I need one.
1
Work
Occupation
Programmer
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
San Antonio
Previously
Links
Education
  • Texas Tech
    Computer Science, 2008 - 2010
  • West Texas A&M University
    Computer Science, 2002 - 2006
Basic Information
Gender
Male
David Ellis's +1's are the things they like, agree with, or want to recommend.
Pippo : Pippo
www.pippo.ro

Micro Java Web Framework

Obama Goes Full Stalin: Tells Secret Court To Ignore Law He Signed 4 Hou...
www.zerohedge.com

Just when we thought the absurdity that marks every single day of Obama's reign could not possibly be surpassed, we learned that 4 hours (3

Stitch Fix Technology
technology.stitchfix.com

Stitch Fix is a full-stack startup creating unique solutions in data-driven merchandising, massively scaled personal styling, and complex lo

AngularJS Articles, Workshops and Developers
www.airpair.com

One of the best collections of #AngularJS Articles, Live Workshops and Developers on the web

Avoiding a Common Mistake with Time Series | Silicon Valley Data Science
svds.com

A basic mantra in statistics and data science is correlation is not causation, meaning that just because two things appear to be related to

Monoids, Functors, Applicatives, and Monads: 10 Main Ideas
monadmadness.wordpress.com

I'm making this post because after spending months learning about all the different properties of monoids, functors, applicatives, and monad

Obama Is Not a Monarch
www.politico.com

The Constitution designs a system of checks and balances for our nation, and executive amnesty for illegal immigrants unilaterally decreed f

ObamaCare Architect Admits "Lack Of Transparency" Is Huge Advantage Agai...
www.zerohedge.com

Caught on tape: “Lack of transparency is a huge political advantage,” Gruber said. “And basically, call it the stupidity of the American vot

0a explains: Calculus (with pics and gifs)
0a.io

Calculus explained with pics and gifs. Written in possibly (hopefully) the most comprehensible way for anyone who is new to limit, different

Confidence Intervals Based on Resampling
www.stat.wmich.edu

Confidence Intervals Based on Resampling

Rambles around computer science
www.cl.cam.ac.uk

Rambles around computer science. Diverting trains of thought, wasting precious time. Tue, 07 Oct 2014. Seven deadly sins of talking about “t

11 Ways You Know You Live In A Country Run By Idiots | Zero Hedge
www.zerohedge.com

Leading news site for global finance, economics, market, and political analysis.

SaaS Product Validation Techniques
ryanbattles.com

Product validation is the crucial foundation for building a successful startup, a process that cannot be taken lightly.

Hacker News
news.ycombinator.com

Ask HN: I was hired and unhired in 2 weeks, for no reason – I am fucked. 84 points by guybrushT 42 minutes ago | 42 comments. 3. Show HN: HN

Gaussian Quadrature | Austin G. Walters
austingwalters.com

Gaussian Quadrature can be used to approximate an integral, I have done a comparison on different quadrature methods previously. However, I

Rob Pike's 5 Rules of Programming Rule 1. You can't tell where a ...
users.ece.utexas.edu

Rob Pike's 5 Rules of Programming. Rule 1. You can't tell where a program is going to spend its time. Bottlenecks occur in surprising places

Our water heater went out on a Sunday afternoon. My wife called called Shafer Services immediately after we noticed the leak, and they scheduled us an appointment for Monday morning. First thing Monday morning, Shafer called us and dispatched a plumber, Ismael, to our house to figure out what was going on and consult with us about what we needed to do. Shortly after dispatch, Ismael arrived at our house, checked out the water heater, and quickly identified the multiple issues it was having. He explained what would have to be done to service our existing water heater and then explained why replacing it was by far the most cost effective solution. He worked up a list of several replacement options, sat down with us, and patiently explained the pros and cons of each option, warranty period, etc. We gave it some thought, and after we decided on one of the options, Ismael got to work pulling the old water heater and preparing for the installation of the replacement water heater. Together with one of his co-coworkers, Franc, they had the replacement delivered and installed before noon. All told, it only took about 4 hours for Schafer to schedule a plumber, dispatch him to our house, identify our problems, consult with us on the solution, pull the old water heater, deliver the replacement water heater, and install it. This is the second time we've had Shafer do work at our house - first time was for an A/C system replacement - and once again, we found their service to be top-notch. Excellent job guys!
• • •
Public - 3 weeks ago
reviewed 3 weeks ago
2 reviews
Map
Map
Map