Inverse graphing calculator

http://www.xamuel.com/inverse-graphing-calculator.php?phrase=Hello+HN

by anigbrowl • 16 years ago

38 16 16 years ago

xamuel.com

revorad• 16 years ago

This is clever. But surely, 'l' and 'o' should be simpler.

rcfox2• 16 years ago

How about a copy-able version of the equations so that we can test them to see if they actually work?

jackowayed• 16 years ago

Seconding this. Plus then you can be really nerdy and say "yo, graph this" and send the equation to them and they type it into something and see the message.

Usecase: if this had come out like 2 weeks ago with copy-able equations, I probably would have asked someone to prom with it.

jonp• 16 years ago

The URL of the equation image contains the equation in TeX.

rubidium• 16 years ago

Copy image location of the img gives you the equation in TeX.

Then you can use ToExpression[...] in Mathematica to try and graph it.

I haven't tried it myself, but I assume that should work.

http://reference.wolfram.com/mathematica/tutorial/Generating...

rcfox2• 16 years ago

Hm, Wolfram|Alpha doesn't like that function, and I don't have access to a real instance of Mathematica...

JBiserkov• 16 years ago

Why does every "string" end in (y^2 - 6y +8 + sqrt(y^4 - 12y^3 + 52y^2 - 96y + 64))^2 ?!?

z8000• 16 years ago

The empty string does not.

http://www.xamuel.com/inverse-graphing-calculator.php?phrase...

But, I have no idea. Perhaps it is a bug wherein a CRLF is being added to the internal string? However, I highly doubt that.

merraksh• 16 years ago

It's a rather complicated way to ensure that all points have y coordinate between 2 and 4, thus cutting all lines that would extend out of the "writable" two squares.

That expression equals zero if and only if 2<=y<=4.

(edit) If you try "L", the formula contains a product member (x-2) that would produce a vertical line whose points all have x=2, containing the vertical segment of "L". The final string excludes that.

hristov• 16 years ago

Great now I can just generate the equations for "suck my cock" and put them on a t-shirt. And then I will be insulting everyone I meet without them even knowing.

roundsquare• 16 years ago

Very neat.

I'm guessing you have a function for each letter and you add a shift depending on where it is in the phrase? Or are you creating the formulas on the fly?

If its being created dynamically, you could probably find a cool way to do this for arbitrarily drawn pictures.

bboylan• 16 years ago

Someone make a self printing equation.

It would totally make my day.

giu• 16 years ago

Here you go: http://en.wikipedia.org/wiki/Tuppers_self-referential_formul...

I hope your day is made now :)

gjm112• 16 years ago

Nope. That's an arbitrary-thing-printing equation, controlled by a parameter that you have to set to a Very Large Number to make it display anything interesting. The Very Large Number is not part of what the formula displays. To get a genuinely self-displaying formula you'd need to throw in some Goedel/Quine tricksiness.

cracki• 16 years ago

how about an "inverse" graphing calc that takes an arbitrary line drawing and gives me a "nice-looking" equation and not just the vectorized representation?

Inverse graphing calculator

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