forgot to send it to all ---------- Forwarded message ---------- From: Kasper Tordrup <[email protected]> Date: Wed, May 2, 2012 at 7:41 PM Subject: Re: [Help-glpk] fraction with vars To: Michael Hennebry <[email protected]>
On Wed, May 2, 2012 at 6:36 PM, Michael Hennebry < [email protected]> 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) >> > > (repeating) > > 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 [email protected] > "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? -- *Kasper Tordrup - Stud. M. Sc. IMADA @ University of Southern Denmark [email protected] - +45 27 44 58 49*
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