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Symmetric Relations
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Hey , I have this data set with four inputs and two outputs. Let the inputs be x1,x2,x3,x4 and the outputs, y1 and y2. Now I am using Eureqa to model y1 and y2 as functions of x1,x2,x3 and x4. I have an important constraint, though , for my final models. I need them to be symmetric about (x1,x2) and (x3,x4) , i.e. ,Let the initial models be... more »
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Questions about numeric constants and data set in Eureqa
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Dear Michael, In the blog titled *Setting and using validation data*, you illustrated that, the training data is used to optimize models, whereas validation data is used to test how well models generalize to new data, and Eureqa also uses the validation data to filter out the best models to display in the... more »
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Does Eureqa use GP to create formulas
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On the home page of Eureqa, it does tell something about the
technology behind Eureqa but not in a specific way. Can I assume that
Eureqa mainly uses Genetic Programming to get different formulas ?
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Skipping Polynomial Solutions
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Hello. Is anyone aware of a way to use input variables, constants, and powers (along with other functions) as building-blocks, but instruct Eureqa to *avoid* polynomial solutions? Thanks! Harlan
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Bug with matlab API?
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I was having a look at the matlab API and there is a possible bug; in
the gateway file eureqa_select.cpp the following code:
for (i=0;i<nbest;i++)
{
eval[i] = best_solutions[i].fitness_;
mexPrintf("%f \n",eval[i]);
... std::string eureqa_output =
best_solutions[maxloc(eval,nbe st)].text_;... more »
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Splitting data into training and validation sets
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While using the "Custom mode" in the "Set Target" window of Eureqa II
the dataset is split properly into training and validation sets
according to the percentages specified in the "Data Setting" window.
This I have verified by manually counting the coloured training and
validation data points in the "Solution fit" plot. However, what I... more »
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Patterns of models in convergence
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So I have done a few fitting of strange things and there seems to be a
pattern. I'm not sure about this so can someone tell me if this is
right?
At first there is a bunch of random, small complexity models. After
that "stage" there is a stage where it reproduces a lot of high-
complexity models mostly along the same general themes. I think it... more »
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Future of Eureqa kind of programs
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I wonder Eureqa can now find formulas out of data.
what if a program had hundreds of known formulas, and some constants
would it then next be possible to find new formulas. If it could be
explained all math and physics formulas including quantum-mechanics,
entropy, statistics, string theory etc etc.. Would it be then able to... more »
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Keeping the same functional form but different co-efficients.
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I was wondering if its possible to get eureqa to maintain the same
functional form but use different coefficients. This occurs when for
two or more studies there is a common function but the coefficients
are different - perhaps the intercept is different. For example say I
have y1 x1 x2 y2 x3 x4 and I would like eureqa to minimise the sum... more »
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repeated measures design
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I'm trying to figure out if there is a way to structure the data and
model to account for a repeated measures model. The data structure is
this: I have annual data (11 years) collected on a set of 324
geographically fixed points. I'm looking to model changes in various
outcomes as they fluctuate over the 11 year span. Some of the... more »
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