Edit: I'll keep it in the back of my head, and I might try it later.
Looks quite powerful already. With a few more standard probability/ and statistics-related functions I could see this becoming an excellent tool for finance and consulting work.
If you want to manually email me when it's done my address is in on my profile page.
This looks really cool!
We have a bunch of complicated maths in a java library. At the moment I've got a jruby wrapper around it and using the jruby repl, but it would be awesome if I could use this with it.
Cleverly, Calca appears to go a bit further than even MMA by back-filling changed definitions, almost like functional reactive programming. This is neat and something I've wanted to see for a long time.
I'll be buying once I get home to my iPad, but I really want to see the Mac OS version!
I'll definitely be buying your OSX version. Have you settled on a price yet?
What I'd really like to see is something like this, but with in-line typesetting. Similar to the Markdown editors where when the line is active and you're editing it you see the raw text, but when you move off to another line you see the typeset mathematics. Because at the moment, it's just so much quicker and easier to think with pen and paper when you can actually write and read correct notation, rather than a monospaced-ASCII-fascimile...
If you're not the lucky dude at the conference room's computer and just happens to have IPython Notebook/LightTable/Excel/`w/e`, then this will be handy. Be the guy who keeps up with the conversation and can check assumptions.
The fact it allows variable names with spaces is just the sweetest syntactic sugar.
It runs a smidge slow on the iPhone, but since that's the tool I have on hand, I'll gladly take a lightweight equation solver like this. (And if the slide-to-change numbers feature gets added, I'll happily buy it again. Twice.)
Fun fact: The slowness is bottlenecked by how fast I can update the text editor - the calculations themselves usually only take 10% of the update time. It's a big area that can be improved.
However you'll have to prize my HP 50g calculator out of my cold dead hands before I'll mix mathematics and a touch screen.
It would be good if plurals for variable names were the same as the singular, so that
light speed = 299,792,458 meters/second
Would be compatible with
time to earth=> 499.242173411seconds
Also, it would be nice if "per" was equivalent to /
Also, it would be nice if definitions didn't have to be
Single item on the left = many things on the right. For example, this would be nice:
Miles per gallon = 34
Gas tank = 13 gallons
Range = miles per gas tank
So far I'm having a lot of fun and already posted it to Facebook.
Also, for seriously complicated work, maybe a desktop all in one touch screen could be useful, so long as it's oriented more horizontally than vertically.
I have very high hopes for an R + LightTable integration.
I am not a huge fan of markdown other than as a "with benefits" convention for text documents, but I see a fair amount of superiority over Sweave/LaTeX for short documents and literate programs.
I see that most people use embedded LaTeX for expressions in various markdown implementations. Is this canonical or is this the result of 'improved' implementations such as Pandoc, etc.?
Btw, OP, you got your $2.99 - royalty from me because I want yet another reason to tell people there is no reason for them to have their laptops open in meetings.
Just a heads up, when creating a new document in ios 7 beta 3 on the ipad there is a crash. Author, what is the best way to send you the crash log?
Just something to look into before ios7 releases.
f = m*a
f(20) = 20a
f(a) = m*a
f(20) => 20a
Otherwise, quite nice.
f(a) = m*a
f(20) => 20m
Includes a formula preview: