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Well like the batman equations and equations for heart, I once saw a site that draws equation for whatever text you type....but now I can't find it. Does anybody know such a site? Also a general explanation how do they do it...I think they have to write equations for all characters from $a$ to $z$ manually then do some coordinate shift etc.

PS: If somebody has some matlab code to help then it will be awesome.

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    Please consider wording your question more carefully. I can't figure out what you are asking. Are you wanting a graphing utility (you give an equation and it produces a graph), or by "equation" do you mean "LaTeX code"?2011-10-28
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    like in matlab f = @(x,y)((x.^2 + y.^2 -1)^3 - (x.^2) *(y.^3)); will draw a heart....so i want a function f(x,y) such that plot of f(x,y)=0 is some text(or looks like text)....2011-10-28

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