R Archives

On indexing operators and composition

Blog R Rposted by John Mount May 20, 2017

In this article I will discuss array indexing, operators, and composition in depth. If you work through this article you should end up with a very deep understanding of array indexing and the deep interpretation available when we realize indexing is an instance of function composition... Read more

Fixing an infelicity in ‘leaps’

R Tools & Languages Rposted by Thomas Lumley April 23, 2017

The ‘leaps’ package for R is ancient – this is its tenth twentieth year on CRAN. It uses old Fortran code by the Australian computational statistician Alan Miller. The Fortran 90 versions are on the web, but Fortran 90 compilation with R wasn’t portable back then, so I... Read more

Useful Functions in R

R Tools & Languages Rposted by Ujjwal Karn April 10, 2017

I have listed some useful functions below: with() The with( ) function applys an expression to a dataset. It is similar to DATA= in SAS. # with(data, expression) # example applying a t-test to a data frame mydata with(mydata, t.test(y ~ group)) Please look at other... Read more

Decrypt Emotion with our Web App…and learn APIs in R

Blog Rposted by Edward Kwartler February 18, 2017

Editor’s Note: Jump to the emotion reader application, submit the img url and see what their face says. An API is a way for one piece of software to interact with another application. API stands for “application program interface” allowing your application or R script to interact with... Read more