918 search results for "register"

Make pleasingly parallel R code with rxExecBy

April 28, 2017
By
Make pleasingly parallel R code with rxExecBy

Some things are easy to convert from a long-running sequential process to a system where each part runs at the same time, thus reducing the required time overall. We often call these "embarrassingly parallel" problems, but given how easy it is to reduce the time it takes to execute them by converting them into a parallel process, "pleasingly parallel"...

Read more »

qualtRics 1.0 now available from CRAN

April 26, 2017
By
qualtRics 1.0 now available from CRAN

Qualtrics allows users to collect online data through surveys. My R package qualtRics contains convenience functions to pull survey results straight into R using the Qualtrics API instead of having to download survey results manually. Currently, the...

Read more »

R 3.4.0 is released – with new speed upgrades and bug-fixes

April 24, 2017
By
R 3.4.0 is released – with new speed upgrades and bug-fixes

R 3.4.0 (codename “You Stupid Darkness”) was released 3 days ago. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of bug fixes and new features is provided below. As mentioned two months ago by David Smith, R 3.4.0 indicates several major changes aimed at improving the performance of R in … Continue...

Read more »

Order Type and Parameter Optimization in quantstrat

April 24, 2017
By
Order Type and Parameter Optimization in quantstrat

In this post we look at stop-loss orders in quantstrat, and how to pick optimal parameters for a strategy.

Read more »

R 3.4.0 now available

April 24, 2017
By

R 3.4.0, the latest release of the R programming language (codename: "You Stupid Darkness"), is now available. This is the annual major update to the R language engine, and provides improved performance for R programs. The source code was released by the R Core Team on Friday and binaries for Windows, Mac and Linux are available for download now...

Read more »

Explaining complex machine learning models with LIME

April 22, 2017
By
Explaining complex machine learning models with LIME

The classification decisions made by machine learning models are usually difficult - if not impossible - to understand by our human brains. The complexity of some of the most accurate classifiers, like neural networks, is what makes them perform so wel...

Read more »

Does money buy happiness after all? Machine Learning with One Rule

April 22, 2017
By
Does money buy happiness after all? Machine Learning with One Rule

This week, I am exploring Holger K. von Jouanne-Diedrich’s OneR package for machine learning. I am running an example analysis on world happiness data and compare the results with other machine learning models (decision trees, random forest, gradient...

Read more »

Microeconomic Theory and Linear Regression (Part 2)

April 21, 2017
By
Microeconomic Theory and Linear Regression (Part 2)

Introduction In the first part of this article I explained and compared four different functional forms to model apples' production. This is what I need to retake the previously explained examples: # Libraries #install.packages(c("micEcon","lmtest","bbmle","miscTools")) library(micEcon) library(lmtest) library(stats4) #this is a base package so I don't install this library(bbmle) library(miscTools

Read more »

Rblpapi 0.3.6

April 20, 2017
By

Time for a new release of Rblpapi -- version 0.3.6 is now on CRAN. Rblpapi provides a direct interface between R and the Bloomberg Terminal via the C++ API provided by Bloomberg Labs (but note that a valid Bloomberg license and installation is requir...

Read more »

Release ‘open’ data from their PDF prisons using tabulizer

April 18, 2017
By
Release ‘open’ data from their PDF prisons using tabulizer

There is no problem in science quite as frustrating as other peoples' data. Whether it's malformed spreadsheets, disorganized documents, proprietary file formats, data without metadata, or any other data scenario created by someone else, scientists have taken to Twitter to complain about it. As a political scientist who regularly encounters so-called "open data" in PDFs, this problem is...

Read more »

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)