WorldPhones             package:datasets             R Documentation

The World's Telephones

Description:

     The number of telephones in various regions of the world (in
     thousands).

Usage:

     phones

Format:

     A matrix with 7 rows and 8 columns.  The columns of the matrix
     give the figures for a given region, and the rows the figures for
     a year.

     The regions are: North America, Europe, Asia, South America,
     Oceania, Africa, Central America.

     The years are: 1951, 1956, 1957, 1958, 1959, 1960, 1961.

Source:

     AT&T (1961) _The World's Telephones_.

References:

     McNeil, D. R. (1977) _Interactive Data Analysis_. New York: Wiley.

Examples:

     require(graphics)
     matplot(rownames(WorldPhones), WorldPhones, type = "b", log = "y",
             xlab = "Year", ylab = "Number of telephones (1000's)")
     legend(1951.5, 80000, colnames(WorldPhones), col = 1:6, lty = 1:5, 
            pch = rep(21, 7))
     title(main = "World phones data: log scale for response")

