Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**Reuel****Member**- Registered: 2010-11-28
- Posts: 178

Hi!

I found this, did a few quick searches, and decided no one had posted it yet.

Here is a calculator that you type a phrase into and a mathematical equation is made that will graph the phrase you have typed.

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

I tried a simple one in Maple (the letter N) as an implicit plot and it wasn't perfect, and the equations are so long they have little (if any) practical use, but I thought it was interesting and could be a fun way to send messages to your friends.

Or secret agent spy codes.

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

Hm, I think I remember something similar on the forum. I think it was from sone Japanese/Chinese guy (sorry for not knowing which if the two). I'll have a check to find his link.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,248

Hi Reuel;

What did you give to Maple to calculate? For one thing I would surely like to see how the graph has been ranged.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**Reuel****Member**- Registered: 2010-11-28
- Posts: 178

As previously stated, I gave it an implicit plot. I determined the domain by finding where the radicand was zero and because I knew the "letter" would be in height some value close to its width I just made the range equal to its domain. In the case of the letter N I believe it was from x = 2..4.

The plot didn't look that great but it may be fixed by upping the number of points with the numpoint option. I did one letter because the equations are gigantic. I just thought it was a fun program. It would be more fun if you could copy and paste the math into something like Maple but all it yields is a picture of the equation.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,248

Hi;

He could improve the app by making it spit out the formula in latex and regular text.

I am not sure that he found the most economical way.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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