When I originally created this thread I was thinking in Neural Network and Machine Learning kind of functions and capabilities. It is nice to see it evolving into something as useful and needed. What I’m thinking is a github with all these kind of basic and necessay math functions. So far is empty but I’ll be feeding it at some point in the near future.
If someone wants to participate or collaborate (so we can have a more robust library) feel free to say so and then I can add you as collaborators.
P.S. I’m fairly new to github (as you can see in the git profile, so feel free also to add structrue if needed)
Hi everyone,
I’ll throw my $0.02 in as well. I’m looking to do nonlinear regression on data that I am capturing with Ignition. The expectation function is y = A*(x + B)^(-C) + D so I fear it is not as easy as using Jordan’s polynomial regression function (tantalizingly close though).
Currently I have to capture the dataset in Ignition, export it into Minitab where I do the regression, and then enter my A,B,C, and D coefficients back into Ignition where I take the derivatives of the function. I’d like to avoid the need for Minitab.
Would’ve been easy in scipy, but we all know that’s not an option. I can’t decipher if either the JScience or Apache Math collections can do this kind of regression. Can they? If so, how do I implement them?
If not, Jordan, what are my chances of you adding this kind of number crunching to your library??! Do you like donuts??
Since Ignition 8 finally uses Jython 2.7, it is possible to use Execnet to call CPython libraries from Ignition.
One of my colleagues is currently testing a regression analysis with numpy and scikit-learn. The data is send in a request to the gateway and a gateway script computes the regression in CPython using the ExecNet methods.
Since the library has alot of different fuctions, it would be a bit tough to provide an example of how it can be used. But you can import things from this library(example below) now and use them to perform functions.
from org.apache.commons.math3.ml.clustering import KMeansPlusPlusClusterer
To clarify a bit, we took the most common parts and put them into system.math to make it easy for people to use this. But for our more advanced scripters, you have access to all of org.apache.commons.math3 by pulling in the appropriate imports.
Resurrecting an old thread. Thank you for system.math. However, for some of these functions the manual needs to spell out the method being used. For instance, standard deviation can be sample or population and as I am sure you know, the formulas are different. Please specify which is being used or better yet, show the formula.
If you need a particular implementation, you can also just import the specific class you want directly, since we’re adding commons.math to the client/designer classpath.
