This looks useful. Is it tied to jvm? On Tuesday, May 28, 2013 6:21:30 PM UTC-7, Mikera wrote: > > On Wednesday, 29 May 2013 02:19:41 UTC+8, Brian Craft wrote: > >> Are there any existing libs for the evaluation of math expressions? For >> example, if the user enters "x + sin(y)", parse and evaluate the >> expression, given vectors of floats for x and y. > > > You can evaluate expressions like this right now in core.matrix if you > don't mind Lisp notation: > > (use 'clojure.core.matrix) > (use 'clojure.core.matrix.operators) ;; override +, -, == etc. > > (def x [1 2 3 4 5 6 7]) > (def y [0 1 2 3 4 5 6]) > (+ x (sin y)) > => [1.0 2.8414709848078967 3.909297426825682 4.141120008059867 > 4.243197504692072 5.041075725336862 6.720584501801074] > > To enable this to handle regular infix maths expressions, it should be > fairly easy to layer an Instaparse parser on top of this. > > Also, one of our newly accepted GSoC students (Maik Schünemann) is > looking at a library for expressing, manipulating and evaluating symbolic > maths expressions. Some initial experiments here: > > https://github.com/clojure-numerics/expresso > > Once this is complete, it should be possible to simply such expressions, > compute symbolic derivatives etc. > > > > >
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