May 14, 2015

How long did it take to run ? system.time in r r in day #6

system.time(mydata_2MM <- read.table('~/Desktop/data/bifile.csv', sep=",", nrows=20000000))

user system elapsed
829.317 201.972 2065.421

Coruscation's r in a day #6.

May 2, 2015

Subset data some observations: which[, r in a day #5

Keep observations where brand = Sony and discard other observations.

newdata <- olddata[ which(olddata$brand=='Sony'), ]

Coruscation's r in a day.

November 30, 2014

See first 10 observations in a data set: head, r in a day #4

head prints the top ( first observations or lines) of a data set.

head(dataset_name, n=10)

X1 X2 X3
a 2 4
b 2 4
c 1 3
c 1 2
c 2 2
e 4 5

Coruscation's r in a day.

June 29, 2014

Adam Hogan beginning r

Adam Hogan's Beginning r. More r.

November 9, 2013

r a day #1: ls() lists datasets in the workspace

Q #1. What data do I already have in my r workspace ?

A #1.


r - r in a day.

August 3, 2009

SSPS, bought by IBM for $1.2 billion

I.B.M. took a big step to expand its fast-growing stable of data analysis offerings by agreeing on Tuesday to pay $1.2 billion to buy SPSS Inc., a maker of software used in statistical analysis and predictive modeling.

Other independent analytics software makers may well become takeover targets, said Mr. Evelson of Forrester. Among the candidates, he said, are Accelrys, Applied Predictive Technologies, Genalytics, InforSense, KXEN and ThinkAnalytics.

The broad consolidation wave in business intelligence software, analysts say, will bring increasing price pressure on some segments of the industry as major companies seek to increase their share of the market. And the open-source programming language for data analysis, R, is another source of price pressure on software suppliers.

"None of the consolidation purchases we've seen in the business intelligence industry have been fire sales," said Jim Davis, senior vice president of the SAS Institute, a private company based in Cary, N.C., that is the largest supplier of business intelligence and predictive analytics software.

Continue reading "SSPS, bought by IBM for $1.2 billion" »

September 27, 2007

Learn r by doing: the movie

Dan Goldstein of Decision Science News brings us
Tutorial 1 in the r statistical programming system:

* Downloading and installing R in Windows
* The R graphical user interface
* Viewing the graphics demo
* Vectors and basic stats
* Simple plotting

Continue reading "Learn r by doing: the movie" »

August 29, 2005

r graphics (Paul Murrell) is out

R Graphics by Paul Murrell shipped.

Previously announced.

Continue reading "r graphics (Paul Murrell) is out" »

August 4, 2005

Information Visualisation with r

Information Visualisation Lecture Slides uses r.

Continue reading "Information Visualisation with r" »