#*****************************************************************************80
#
## snowfall_plot plots yearly snowfall data.
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    21 August 2020
#
#  Author:
#
#    John Burkardt
#
cat ( date ( ), "\n" )
cat ( "\n" )
cat ( "snowfall_plot\n" )
cat ( " ", version$version.string, "\n" )
cat ( "  Make a line plot of snowfall data.\n" )

filename = "snowfall_data.txt"
data <- read.table ( filename, header = FALSE )
year = data[,1]
inches = data[,10]

filename = "snowfall_plot.png"
png ( filename )
plot ( year, inches, 
  xlab = "Year", 
  ylab = "Total Snow in Inches",
  main = "Yearly Snowfall at Michigan Tech",
  type = 'l',
  col = 'blue',
  lwd = 3 )
grid ( )
cat ( '  Graphics saved as "', filename, '"\n' )
#
#  Terminate.
#
cat ( "\n" )
cat ( "snowfall_plot\n" )
cat ( "  Normal end of execution.\n" )
quit ( )