At Thu, 21 Jul 2011 15:37:55 +0200, Giovanni Ridolfi wrote: > > Daniel E. Doherty <ded-...@ddoherty.net> writes: > > > That's certainly thinking outside the box, but I don't think it > > works. > > Actually, Daniel you don't have to *think*, you've to demonstrate > that it works or that it doesn't /tertium non datur/. > > > In your example, 1:09 represents 1/9th in calc's fraction mode, > > not 1+9/60 which it would have to in order to compute with it. > Not with GNU/Emacs 23.3 calc. > > If you bill 50 per 1 hour, you bill > > (/ 50 60.0 ) is 0.83 per minute.
Agreed. > > If you bill 1 hour + 9 minutes it is 69 minutes > > (* 0.83 69) 57.269999999999996 = 57.27 > > isn't it ? > It is. > And the fifth column in my table (see below) does compute 57.27 or not? > Not. At least when I do it. Here's what I get after recalcing your example. | Argo Status Hearing <2011-06-28 Tue 09:00> | | | 1:09 | 0.09 | | Letter of Discovery Deficiencies | | | 2:48 | 0.03 | #+TBLFM: $5=$4*0.83;Df2 Maybe I have a different mode setting or something. You seem to have the $4, or 1:09, being interpreted as 69, but I have it being interpreted as a calc fraction, i.e., 1/9 = 0.11111111. So 0.83 * 0.111111 gives me 0.9259, which rounds to 0.9. > You may say: "Ah but this is only one example, you've been lucky!" > I would. > I reply, what about the second line? > > (* (+ 120 48) 0.83) = 139.44 > > Calc is *really* smart, isn't it? Undoubtedly. Apart from Org, my favorite features of Emacs. I'm waiting for vi to duplicate that functionality. Thanks for taking the time to look at this. > > cheers, > Giovanni > > > > > Regards, > > > > At Thu, 21 Jul 2011 13:07:28 +0200, > > Giovanni Ridolfi wrote: > >> > >> Daniel E. Doherty <ded-...@ddoherty.net> writes: > >> > >> > Hi all, > >> > > >> > I am trying to use orgmode to bill for time. My idea is to add a column > >> > that multiplies the elapsed time column by an hourly rate. > >> > >> what about using a minute rate? > >> > >> (/ 50 60.0) 0.83 so: > >> > >> | Argo Status Hearing <2011-06-28 Tue 09:00> | | | 1:09 | 57.27 | > >> | Letter of Discovery Deficiencies | | | 2:48 | 139.44 | > >> #+TBLFM: $5=$4*0.83;Df2 > >> > >>
