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there is a matrix library for java available http://math.nist.gov/javanumerics/jama/ is there anything similar in groovy?
You can easily use Java libraries inside Groovy code, just import and use. In addition, with a low effort, you could write your own DSL to wrap the JaMa library (and release it of course :)
you could have a look at the GroovyLab or Groovy-Matrix projects covering classes for Groovy math engineering:
http://code.google.com/p/groovylab/
http://code.google.com/p/groovy-matrix/
both projects seem a bit outdated, but it should certainly be not a big problem to push them to the latest Groovy version.
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I'm doing a big machine learning project in Java.
I tried some libraries but they were uncomfortable. Not many algorithms, few examples, unclear function parameters.
So, I wanted to ask if anyone knew a convenient library in Java for machine learning. (In terms of: easy to import, easy to use, lots of samples, etc.)
In addition, I have already read the csv file to a matrix. So if the library uses it, it will be better. Thank you.
Here are a few links
ApacheSAMOA: https://samoa.incubator.apache.org/
Weka: http://www.cs.waikato.ac.nz/ml/weka/
Rapid Miner: https://rapidminer.com/
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I have written a complex simulation software in Java, in which I need to use a lot of statistical distributions (Gamma, Poission, and Exponential). So far, I have been using the Apache Commons library for this, but the calls to Apache Commons are consuming a lot of runtime, which I found out by using a Java profiler (yourkit). The average runtime is > 4minutes, which is unacceptable for me.
Since I am trying to shorten my program's runtime, I was wondering if there is any better library which I might include/attach directly with my Java code?
I use the Eclipse IDE.
Try this,
JDistlib—Java Statistical Distribution Library.To find more, click here
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I am generating C code from a domain-specific language using javacc and I would like a FOSS code reformatter library (jar) that I can invoke on the produced source code to make it readable. Anyone know such a beast?
Brownie points for maven dependency entry in answer :)
Given that you are producing C code, try a C beautifier. If that is suitable, then
Best C++ Code Formatter/Beautifier
is a question that answers which one.
Good luck on the DSL. I've done a bunch of them, but using javacup, yacc and spirit rather than JavaCC if you need help, feel free to contact directly
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I have recently been tasked to working on code that uses Java CUP. Does anybody still use it? I've found a couple small resources on it, but it looks like there isn't much documentation on the main site, Java Cup Website. If there are any mailing-lists or users out there I would like to know. BTW, I can't use the new engine that is being maintained by the people in Munich, I got to stick with version 0.1.
We use the newer one on the Eclipse XPath2 engine (disturbingly called PsychoPath).
CUP gets the job done, but we use the newer one.
Being a small piece of software, it's easier to understand, which makes up for the scarceness of resources.
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I'd like to set up a large linear programming model to solve an interesting problem. I would be most comfortable in Java. What tools/libraries are available?
There were several suggestions from an earlier question that I posted:
CPLEX
Dash
OptimJ
COIN-OR
lp_solve
and possibly more...
I used lp_solve with success. It looks like there is a native Java API, but I've only used the text file interface. It supports the semi-standard MPS and LP file formats, which I found more convenient for trying out different solvers (such as glpsol).
Currently, google digs up this Java Linear Programming libs:
http://scpsolver.org/
http://javailp.sourceforge.net/
http://www.joptimizer.com/linearProgramming.html
http://www.win-vector.com/blog/2012/11/yet-another-java-linear-programming-library/
http://commons.apache.org/math/userguide/optimization.html
http://ojalgo.org/