4146 search results for "git"

Scenario analysis for option strategies.

May 30, 2013
By
Scenario analysis for option strategies.

Introduction to the project I am working on at the moment. It is more a playground for option strategies than "project" at this stage. The idea is to develop accurate scenario analysis on portfolio, which is based on a single underlying. In the past I ...

Read more »

Couch, apis and all that

May 30, 2013
By

It is getting easier to get data directly into R from the web. Often R packages that retrieve data from the web return useful R data structures like a data.frame or plot. This is a good thing of course to make things user friendly. However, what if you want to drill down into the data that's returned from a query...

Read more »

Are Fox News Polls Biased?

May 29, 2013
By
Are Fox News Polls Biased?

Especially after the outcome of the mid-term election, I think there is a common contention among some groups that there is something wonky about Fox News when it comes to reporting polls relative to President Obama and the Democratic Party in general....

Read more »

Parallel Processing: When does it worth?

May 29, 2013
By
Parallel Processing: When does it worth?

Most computers nowadays have few cores that incredibly help us with our daily computing duties. However, when statistical softwares do use parallelization for analyzing data faster? R, my preferred analytical package, does not take too much advantage of multicore processing by default. In fact, R has been inherently a “single-processor” package until nowadays. Stata, another

Read more »

Shiny talk by Joe Cheng

May 29, 2013
By
Shiny talk by Joe Cheng

Shiny is a framework work for creating web applications with R. Joe Cheng of RStudio, Inc. presented on Shiny last evening in Zillow's offices 30 stories up in the former WaMu Center. Luckily, the talk was interesting enough to compete with the view ...

Read more »

Futile.logger 1.3.3 RC available

May 29, 2013
By
Futile.logger 1.3.3 RC available

This is a preview release of futile.logger 1.3.3 so some people with feature requests can try out the code before …Continue reading »

Read more »

Item Analysis App – Shiny Code

May 28, 2013
By
Item Analysis App – Shiny Code

Here is the code for my first Shiny App! It is the one that I posted previously with a few slight revisions. You can see it at:A Shiny R AppIn order to make any sense of this I suggest you working through the tutorial (http://www.rstudio.com/shiny/) it...

Read more »

Why doesn’t R have a MaxDiff package?

May 28, 2013
By

Almost once every year someone asks if R has a package for running the MaxDiff procedure sold by Sawtooth.  One such inquiry recently received a reply with a link showing in some detail the R code needed to generate a balanced incomplete...

Read more »

Intended or Unintended Consequences

May 28, 2013
By
Intended or Unintended Consequences

(This article was first published on Timely Portfolio, and kindly contributed to R-bloggers) A quick glimpse at the US 10y Treasury Bond rate since 2000 seems benign with low volatility and a general downward trend.require(latticeExtra)require(quantmod)US10y <- getSymbols("^TNX", from = "2000-01-01", auto.assign = FALSE)asTheEconomist(xyplot(US10y, scales = list(y = list(rot = 1)), main = "US 10y Yield Since 2000"))From TimelyPortfolioHowever,...

Read more »

Using R to communicate via a socket connection

May 28, 2013
By

Occasionally, the need arises to communicate with R via another process. There are packages available to facilitate this communication, but for simple problems, a socket connection may be the answer. Nearly all software languages have a socket communic...

Read more »