#-------------------------------------------------------------------------------
# Copyright 2012 Yuriy Lagodiuk
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#-------------------------------------------------------------------------------
# allowed functions are: ADD SUB MUL DIV SQRT POW LN SIN COS
# set which functions to use:

ADD SUB MUL DIV SQRT POW

# looking for:

f(x) - ?

# define training set:

f(-5) = 0.958924275
f(-4.6) = 0.993691004
f(-4.2) = 0.871575772
f(-3.8) = 0.611857891
f(-3.4) = 0.255541102
f(-3) = -0.141120008
f(-2.6) = -0.515501372
f(-2.2) = -0.808496404
f(-1.8) = -0.973847631
f(-1.4) = -0.98544973
f(-1) = -0.841470985
f(-0.6) = -0.564642473
f(-0.2) = -0.198669331
f(0) = 0
f(0.2) = 0.198669331
f(0.6) = 0.564642473
f(1) = 0.841470985
f(1.4) = 0.98544973
f(1.8) = 0.973847631
f(2.2) = 0.808496404
f(2.6) = 0.515501372
f(3) = 0.141120008
f(3.4) = -0.255541102
f(3.8) = -0.611857891
f(4.2) = -0.871575772
f(4.6) = -0.993691004

threshold = 0.5