#*****************************************************************************80
#
## graddsc_test tests graddsc.
#
#  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:
#
#    14 March 2020
#
#  Author:
#
#    John Burkardt
#
cat ( date ( ), "\n" )
cat ( "\n" )
cat ( "graddsc_test\n" )
cat ( " ", version$version.string, "\n" )
cat ( "  graddsc seeks the minimum of a function using gradient descent.\n" )
cat ( "\n" )

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

fp <- function ( x ) { x^3 + 3*x^2 - 1 }
x = - 2.0
h = 0.01
value <- graddsc ( fp, x, h )
cat ( "  graddsc(x^3+3x^2-1,-2.0,0.01) = ", value, "\n" )
#
#  Terminate.
#
cat ( "\n" )
cat ( "graddsc_test\n" )
cat ( "  Normal end of execution.\n" )
cat ( date ( ), "\n" )

quit ( )