---------- Forwarded message ----------
From:
Kasper Tordrup <address@hidden>
Date: Wed, May 2, 2012 at 7:41 PM
Subject: Re: [Help-glpk] fraction with vars
To: Michael Hennebry <
address@hidden>
On Wed, May 2, 2012 at 6:36 PM, Michael Hennebry
<address@hidden> wrote:
On Wed, 2 May 2012, Kasper Tordrup wrote:
After looking over Xypron's example, it became clear to me that you lack
some information, sorry for that.
The x represent a percentage of p that I need, and this means that y is <=
to w.
So summing up:
x will always be <= to p.
y will always be <= to w.
if w is 0, then so are y.
p is a constant.
x,y and w are variables.
y and w are in the range [0..6] (or close to that)
and I want to calculate:
x_suj = p_s * (y_suj/w_su)
if w is 0, then so are y.
x_suj * w_su = p_s * y_suj
No division issues.
(repeating)
The x represent a percentage of p that I need, and this means that y is <=
to w.
Are you sure?
I might be using the wrong words, x is NOT a percentage number (0..100 or 0..1) it is a fraction of p i.e. 2/3 or p.
Sorry for the mess, hope this clarifies it.
Actually, 'tis a bit foggier now.
What is p? Can it be 22/7, 7/22, sqrt(2.), 1/123, pi?
No, p is integer.
Is the equality exact?
Why is there a percentage involved instead of a fraction?
Sorry, x is a fraction of p.
One does not normally calculate with percentages.
Usually, percentages are just human-friendly input or output.
--
Michael
address@hidden
"On Monday, I'm gonna have to tell my kindergarten class,
whom I teach not to run with scissors,
that my fiance ran me through with a broadsword." -- Lily
So, as an example p=1000, y=1 and w=3 and so I want to find x=333.3333
Does this make it a bit more clear?