Gsl.Fcmp (gb.gsl)
Static Function Fcmp ( X As Float, Y As Float, E As Float ) As Integer
This function determines whether
X and
Y are approximately equal to a relative accuracy epsilon
E.
The relative accuracy is measured using an interval of size 2D, where
D = (2 ^ K) E and
K is the maximum base-2 exponent of
X and
Y as computed by the C function
frexp.
-
If X and Y lie within this interval, they are considered approximately equal and the function returns
0.
-
If X < Y, the function returns
-1.
-
If X > Y, the function returns
+1.
Note that
X and
Y are compared to relative accuracy, so this function is not suitable for testing whether a value is approximately zero.