#*****************************************************************************80
#
## pwiselinterp_test tests pwiselinterp.
#
#  Licensing:
#
#    Copyright 2016 James P. Howard, II
#
#    The computer code and data files on this web page are distributed under
#    https://opensource.org/licenses/BSD-2-Clause, the BSD-2-Clause license.
#
#  Modified:
#
#    22 February 2020
#
#  Author:
#
#    John Burkardt
#
cat ( date ( ), "\n" )
cat ( "\n" )
cat ( "pwiselinterp_test\n" )
cat ( " ", version$version.string, "\n" )
cat ( "  pwiselinterp carries out piecewise linear interpolation.\n" )

source ( "/home/burkardt/public_html/r_src/pwiselinterp/pwiselinterp.R" )  

cat ( "\n" )

x <- c ( -2, -1,  0,  1 )
y <- c ( -2, -2, -1,  2 )

cat ( "\n" )
cat ( "  x data:\n" )
cat ( "\n" )
print ( x )

cat ( "\n" )
cat ( "  y data:\n" )
cat ( "\n" )
print ( y )

mb = pwiselinterp ( x, y )

cat ( "\n" )
cat ( "  Slopes m:\n" )
cat ( "\n" )
print ( mb$m )

cat ( "\n" )
cat ( "  Intercepts b:\n" )
cat ( "\n" )
print ( mb$b )

#
#  Terminate.
#
cat ( "\n" )
cat ( "pwiselinterp_test\n" )
cat ( "  Normal end of execution.\n" )
cat ( date ( ), "\n" )

quit ( )