Difference between revisions of "Erin's equation"
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Giantsquid (talk | contribs) (Created page with "'''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. ==Pytho...") |
Giantsquid (talk | contribs) |
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| Line 7: | Line 7: | ||
t = pow(10, floor(log10(x))) | t = pow(10, floor(log10(x))) | ||
return t * floor(x/t) | 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== | ==Example== | ||
Revision as of 19:04, 23 October 2015
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
