R Dataset / Package datasets / WWWusage

Documentation

On this Picostat.com statistics page, you will find information about the WWWusage data set which pertains to Internet Usage per Minute. The WWWusage data set is found in the datasets R package. You can load the WWWusage data set in R by issuing the following command at the console data("WWWusage"). This will load the data into a variable called WWWusage. If R says the WWWusage data set is not found, you can try installing the package by issuing this command install.packages("datasets") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the WWWusage R data set. The size of this file is about 683 bytes.


Internet Usage per Minute

Description

A time series of the numbers of users connected to the Internet through a server every minute.

Usage

WWWusage

Format

A time series of length 100.

Source

Durbin, J. and Koopman, S. J. (2001) Time Series Analysis by State Space Methods. Oxford University Press. http://www.ssfpack.com/dkbook/

References

Makridakis, S., Wheelwright, S. C. and Hyndman, R. J. (1998) Forecasting: Methods and Applications. Wiley.

Examples

require(graphics)
work <- diff(WWWusage)
par(mfrow = c(2, 1)); plot(WWWusage); plot(work)
## Not run: 
require(stats)
aics <- matrix(, 6, 6, dimnames = list(p = 0:5, q = 0:5))
for(q in 1:5) aics[1, 1+q] <- arima(WWWusage, c(0, 1, q),
    optim.control = list(maxit = 500))$aic
for(p in 1:5)
   for(q in 0:5) aics[1+p, 1+q] <- arima(WWWusage, c(p, 1, q),
       optim.control = list(maxit = 500))$aic
round(aics - min(aics, na.rm = TRUE), 2)## End(Not run)
--

Dataset imported from https://www.r-project.org.

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Attachment Size
dataset-41371.csv 683 bytes
Dataset License
GNU General Public License v2.0
Documentation License
GNU General Public License v2.0