#*****************************************************************************80
#
## ninety_histogram uses a histogram to find outliers in 90 data values.
#
#  Discussion:
#
#    Because the number of data points is fairly large, we hope that a 
#    histogram will show us whether any values are outliers.
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    28 August 2020
#
#  Author:
#
#    John Burkardt
#
cat ( date ( ), "\n" )
cat ( "\n" )
cat ( "ninety_histogram\n" )
cat ( " ", version$version.string, "\n" )
cat ( "  Read a text file of 90 values, and create a histogram" )
cat ( "  that will expose outliers as isolated values." )

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

filename = "ninety_histogram.png"

png ( filename )
hist ( data[,1], 
  xlab = "Data values", 
  ylab = "Frequency",
  main = "ninety: Looking for Outliers",
  col = "red" )
grid ( )
cat ( '  Graphics saved as "', filename, '"\n' )
#
#  Terminate.
#
cat ( "\n" )
cat ( "ninety_histogram\n" )
cat ( "  Normal end of execution.\n" )
quit ( )