[mlpack-git] [mlpack] segmentation fault with LogisticRegression API (#428)

[John Lees]

Thanks for the quick response!

Looks like the size is ok:
x: 3069x1; y: 3069x1.

Rerunning with the debugging symbols gives:
==9284== Process terminating with default action of signal 11 (SIGSEGV)
==9284==  Access not within mapped region at address 0xFFF001000
==9284==    at 0x5017C82: mlpack::regression::LogisticRegressionFunction::Evaluate(arma::Mat<double> const&) const (logistic_regression_function.cpp:80)

Line 80 is:
77 for (size_t i = 0; i < responses.n_elem; ++i)
78  {
79    if (responses[i] == 1)
80      result += log(sigmoid[i]);
81    else
82      result += log(1.0 - sigmoid[i]);
83  }

so it seems sigmoid, defined earlier in the function, is a different length to responses?

If that doesn't help, I can provide a minimal working example?


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Reply to this email directly or view it on GitHub:
https://github.com/mlpack/mlpack/issues/428#issuecomment-87874493
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