core.matrix, I mean.
On Wednesday, May 29, 2013 3:19:02 PM UTC-7, Brian Craft wrote:
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
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
The core.matrix API should be 100% pure Clojure.
Some of the implementations are JVM specific however (e.g. support for fast
operations on Java double arrays etc.)
So... it probably needs a bit of hacking to make it work on ClojureScript
with some form of conditional compilation setup. If
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.
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Incanter has some stuff that does this:
http://data-sorcery.org/2010/05/14/infix-math/
this looks even closer to what you're looking for:
https://github.com/tristan/clojure-infix
On Tue, May 28, 2013 at 2:19 PM, Brian Craft craft.br...@gmail.com wrote:
Are there any existing libs for the
Thanks, I'd seen those. Incanter is jvm only, I think, which is less useful
to me. clojure-infix looks dead, but maybe I can adapt it.
On Tuesday, May 28, 2013 12:42:11 PM UTC-7, travis vachon wrote:
Incanter has some stuff that does this:
http://data-sorcery.org/2010/05/14/infix-math/
You could just write this yourself.
It's easier than it looks.
First start with an evaluator for rpn (reverse polish notation) expressions.
x + sin(y) in rpn would be y sin x +.
First you split that string and make it into a list.
Then you can evaluate that with a few lines of code using a stack.
Found this: http://www.objecthunter.net/exp4j/
Might be useful.
Jonathan
On Wed, May 29, 2013 at 12:45 AM, SpiderPig spiderpi...@googlemail.comwrote:
You could just write this yourself.
It's easier than it looks.
First start with an evaluator for rpn (reverse polish notation)
expressions.
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
Here is some example code
http://pastebin.com/HG2bWWms
This allows you to evaluate infix or rpn expressions. It also demonstrates
the use of eval to turn the expression into a clojure function which should
give more performance.
It is very simple though, so all the elements in the expressions
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