Erin's equation
Revision as of 19:04, 23 October 2015 by Giantsquid (talk | contribs)
Erin's equation is a mathematical function which computes the number that is the same order of magnitude as a given number, but with only one significant digit.
Python sourcecode
def erin(x): from math import * t = pow(10, floor(log10(x))) return t * floor(x/t)
Fortran sourcecode
function erin(x) result(m) use iso_fortran_env implicit none real(real64),intent(in) :: x real(real64) :: m real(real64) :: t t = 10**floor(log10(x)) m = t * floor(x/t) end function erin
Example
erin(9876.54321) = 9000.0