Fixes in precision_bug scripts

* Issue #27

Author: Ezetowers

bugs/precision_bug/README

@@ -0,0 +1,6 @@
+Run MATLAB scripts with the following command:
+
+/path/to/MATLAB/dir/bin/matlab -nodisplay -nosplash -nodesktop -r script
+
+Note: Take a look to the lack of extension in the script. The script MUST be a .m file,
+yet the argument of the command receives it without extension

bugs/precision_bug/expr_test.py

@@ -12,7 +12,7 @@
 
 def initialize_config():
     config = Config.get_instance()
-    config.read('../conf/configuration.ini')
+    config.read('../../conf/configuration.ini')
     return config
 
 # Set printable resolution (don't alter numpy interval resolution)
@@ -30,7 +30,7 @@ def initialize_config():
 expr61 = "(root (exp (- -6.3726 (* -7.1746 S0))))"
 expr612 = "(root (- -6.3726 (* -7.1746 S0)))"
 
-tree = Lisp_Tree_Expr(expr612)
+tree = Lisp_Tree_Expr(expr6)
 x = np.linspace(-10.0, 10.0, num=201)
 mlc_y = tree.calculate_expression([x])
 

bugs/precision_bug/matlab_expr_test.m

@@ -4,8 +4,8 @@
 %--------------------- %
 
 x = -10:0.1:10;
-% m = 'exp(((-6.3726) - ((-7.1746) .* S0)))';
-m = '((-6.3726) - ((-7.1746) .* S0))';
+m = 'cos(exp(((-6.3726) - ((-7.1746) .* S0))))';
+% m = '((-6.3726) - ((-7.1746) .* S0))';
 y = tanh(x.^3-x.^2-1);
 m = strrep(m, 'S0', 'x'); y2=eval(m); J=sum((y2-y).^2); fprintf('%.10f\n', J);