Profile

Cover photo
Joshua Ulrich
Works at DV Trading
Attended University of Missouri–St. Louis
Lives in Saint Louis, MO
339 followers|217,254 views
AboutPostsPhotosVideos

Stream

Joshua Ulrich

Shared publicly  - 
 
A long-overdue TTR update, and quantmod gets some patches to fix recent breakages.
2
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
 
Join me as Nalini Polavarapu from Monsanto talks about The Role of Big Data and Analytics in Modern Agriculture at the STL RUG meetup on May 14 at 5:30pm.

This month's meetup is part of +ITENinStLouis Big Data Extravaganza at the +Venture Café.  Hope to see you there! #rstats  
Produce more. Conserve more. Improve lives. That’s Monsanto’s vision for a better world.  Our seeds, biotechnology traits, herbicides and services help farmers improve productivity, reduce the costs of farming, and grow better foods for consumers and better feed for animals. To increase crop yields globally, data and analytics are being leveraged at every stage of the process from discovery through optimization of product performance in farmer’s ...
1
Joshua Ulrich's profile photoJames Long's profile photo
5 comments
 
Understand fully. Bummed though :(
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
Please try out the new plot.xts that will be on CRAN at the end of April!
1
Tomáš M's profile photoJoshua Ulrich's profile photo
2 comments
 
+Tomáš M That is correct. The new plot.xts broke some existing packages on CRAN, so we have been working with those maintainers to help them patch their packages to work with the new plotting API.
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
The Law of Conservation of Typos, from an instant message conversation with a friend:

me:
  https://github.com/joshuaulrich/xts/commits/develop

  Scroll down to August 32, 2014
  "Fix typo"
  "Retry to fix type"
  Cannot fix teh typo; can only moves them.
friend:
  lol
  conservation of typos
me:
  LOL
friend:
  is beautiful
1
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
 
Join us on March 17 at 6pm as we explore how to build interactive reports using RMarkdown and Shiny. We will walk through an example of an interactive bioinformatic report that allows users to investigate how parameter changes affect results.

Hope to see you there!

#rstats
RMarkdown and Shiny can be combined to generate interactive documents and analysis reports. For this meetup, I will demonstrate the use of R to analyze gene expression (RNA-seq) via the edgeR package from Bioconductor. By combining RMarkdown/Shiny with the edgeR package, we will create an interactive report that will allow the user to explore how changing parameters will affect analysis results and possibly the biological conclusions. We will me...
1
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
The R Project is once again participating in GSoC. Mentors, you have until March 9th to submit your proposals! #rstats   #gsoc2015  
3
1
Evelyn Mitchell's profile photo
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
Competition often requires cooperation.

"Where the market is broad and there are many alternatives, you had better cooperate.  If you choose the noncooperative solution, you may find you have no one to noncooperate with."
1
Add a comment...
In his circles
139 people
Have him in circles
339 people
David Coniglio's profile photo
William Rogers's profile photo
neil ulrich's profile photo
Drew Conway's profile photo
Pairach Piboonrungroj's profile photo
Kiontar Jiko's profile photo
Chris Dunn's profile photo
Jef Allbright's profile photo
John Bollinger's profile photo

Joshua Ulrich

Shared publicly  - 
 
 
In less than two weeks (June 22nd), I'll be teaching Advanced Trading Systems Development at the University of Washington as an online course.  The syllabus is at http://braverock.com/brian/uw_course_overview.html . The course is open to non-degree seeking professionals.  Interested people should  complete the pre-registration here: http://staff.washington.edu/learner/Documents/PreReq-CFRM561.pdf  
1
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
 
Join us April 28 at 6pm as Dr. Dmitry Grapov from Monsanto presents a hands-on introduction to dplyr.

The tutorial will feature an overview of dplyr including the basics of dplyr verbs, using dplyr programmatically, and incorporation of custom functions into dplyr workflows.

Hope to see you there!
#rstats 
dplyr is "A fast, consistent tool for working with data frame like objects, both in memory and out of memory." This tutorial will feature an overview of dplyr including the basics of dplyr verbs, using dplyr programmatically, and incorporation of custom functions into dplyr workflows. You can learn more about dplyr here: http://cran.r-project.org/web/packages/dplyr/index.html Be sure to check out the vignettes! Dr. Dmitry Grapov from Monsanto ...
1
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
A new version of quantmod hit CRAN this weekend.  It fixes some bugs and adds some awesome functionality! #rstats
1
Add a comment...

Joshua Ulrich

Shared publicly  - 
 
 
Join me on February 17th at 6pm to learn how to use xts for high performance time series manipulation in #rstats!
The xts package makes it easier to handle time series data by combining the simplicity of the zoo class with an index that must be a time-based class.  This allows for easy subsetting via ISO-8601 style strings (e.g. "[masked]:40/[masked]:40"), fast time-based merges, and easy conversion to/from other time series classes. This talk will discuss the rationale behind xts' design, a short overview of the class implementation, discussion of R's main ...
1
Add a comment...
People
In his circles
139 people
Have him in circles
339 people
David Coniglio's profile photo
William Rogers's profile photo
neil ulrich's profile photo
Drew Conway's profile photo
Pairach Piboonrungroj's profile photo
Kiontar Jiko's profile photo
Chris Dunn's profile photo
Jef Allbright's profile photo
John Bollinger's profile photo
Work
Occupation
Senior Quantitative Programmer & Analyst
Employment
  • DV Trading
    Senior Quantitative Programmer & Analyst, 2013 - present
  • Enterprise Bank and Trust
    Senior Portfolio Analyst and Trader, 2012 - 2013
  • Wells Fargo Home Mortgage
    Risk Management Analyst, 2010 - 2012
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Saint Louis, MO
Story
Introduction
Ice hockey player, R package author, aspiring entrepreneur.
Bragging rights
Greater than average number of arms, legs, ears, and eyes.
Education
  • University of Missouri–St. Louis
Basic Information
Gender
Male
Birthday
February 6
Relationship
Married