#*****************************************************************************80
#
## automobile_scatter reads the automobile dataset and makes a scatterplot.
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    26 August 2020
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    A Frank, A Asuncion,
#    UCI Machine Learning Repository,
#    http://archive.ics.uci.edu/ml,
#    School of Information and Computer Science,
#    University of California, Irvine, California.
#
cat ( date ( ), "\n" )
cat ( "\n" )
cat ( "automobile_scatter\n" )
cat ( " ", version$version.string, "\n" )
cat ( "  Read a data file of automobile prices and weights." )
cat ( "  Make a scatter plot of pairs of data." )

filename = "automobile_data.txt"
data <- read.table ( filename, header = FALSE )

filename = "automobile_scatter.png"
png ( filename )
plot ( data[,1], data[,2], 
  xlab = "Price in 1985 Dollars", 
  ylab = "Curb weight in pounds",
  main = "1985 car price versus weight",
  col = "blue" )

grid ( )
cat ( '  Graphics saved as "', filename, '"\n' )
#
#  Terminate.
#
cat ( "\n" )
cat ( "automobile_scatter\n" )
cat ( " Normal end of execution.\n" )

quit ( )