Errr... nothing at the moment, but I'll make it Apache2 :-) Bill-
On Mon, Jul 21, 2014 at 8:29 AM, Paul Libbrecht <p...@hoplahup.net> wrote: > Coool. License? > > paul > > > On 21 juil. 2014, at 14:26, William Speirs <wspe...@apache.org> wrote: > > > It's certainly incomplete, but I started working on a CAS (Computer > Algebra > > System: http://en.wikipedia.org/wiki/Computer_algebra_system) that was > > "backed" by commons-math: https://github.com/wspeirs/math > > > > The JJT (parser file for JavaCC) file can be found here, and is fairly > > complete if I remember correctly: > > > https://raw.githubusercontent.com/wspeirs/Math/master/src/main/java/com/educatedsolutions/parser/Math.jjt > > > > I'd be happy to help you with it further and/or accept pull requests to > > improve it :-) > > > > Bill- > > > > > > On Mon, Jul 21, 2014 at 1:59 AM, Ted Dunning <ted.dunn...@gmail.com> > wrote: > > > >> On Sun, Jul 20, 2014 at 9:18 PM, Mansour Al Akeel < > >> mansour.alak...@gmail.com > >>> wrote: > >> > >>> As Luc said, it will big project to write a parser that takes any > >>> equation as a string, and generate the matrix (2-dimensional array) to > >>> feed it into Commons Math. > >>> > >> > >> > >> It actually isn't a big project. > >> > >> See http://www.antlr.org/ > >> > >> The simplest example they give there is this one: > >> > >> *grammar Expr;* > >> *prog: (expr NEWLINE)* ; * > >> *expr: expr ('*'|'/') expr * > >> * | expr ('+'|'-') expr * > >> * | INT | '(' expr ')' ; * > >> *NEWLINE : [\r\n]+ ; INT : [0-9]+ ;* > >> > >> This will compile into a java program that parses expressions very much > >> like what you want. > >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@commons.apache.org > For additional commands, e-mail: user-h...@commons.apache.org > >
