The Lounge is rated PG. If you're about to post something you wouldn't want your
kid sister to read then don't post it. No flame wars, no abusive conduct, no programming
questions and please don't post ads.
I see that it is a workaround, and that Excel has no Calculus functions per se, so it at least can be done for plotting.
The derivatives are easy enough, mental arithmetic really, but it would have been nice just to pump in a function and have it all done for me.
Obscurum per obscurius.
Ad astra per alas porci.
Quidquid latine dictum sit, altum videtur.
It'll cost you a fortune: it's way, way to easy to upload random files to your host and watch the money roll in - and it's not exactly difficult to write a program to automate that. As I said, it's good for me - possibly not for you!
On a serious note, if you are planning on file hosting, then you will have to be pretty careful these days: IIRC a couple of the file sharing sites closed down a few years ago after they were pressured into giving up client lists or face prosecution for illegally hosting copyrighted material their clients had posted up.
Obviously, I don't know what your business model is going to be, but...
You looking for sympathy?
You'll find it in the dictionary, between sympathomimetic and sympatric
(Page 1788, if it helps)
The Most Excellent Movie Quote In Movie History Of The Day
Do I need to ask why?
Voilà! In view, a humble vaudevillian veteran, cast vicariously as both victim and villain by the vicissitudes of Fate. This visage, no mere veneer of vanity, is a vestige of the vox populi, now vacant, vanished. However, this valorous visitation of a by-gone vexation, stands vivified and has vowed to vanquish these venal and virulent vermin vanguarding vice and vouchsafing the violently vicious and voracious violation of volition. The only verdict is vengeance; a vendetta, held as a votive, not in vain, for the value and veracity of such shall one day vindicate the vigilant and the virtuous. Verily, this vichyssoise of verbiage veers most verbose, so let me simply add that it's my very good honor to meet you and you may call me V.