Comments (6)
What version of chumpy are you running? Is it from pipy or from latest master on github? For me, ch.demo('optimisation') is working.
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I'm using the latest master.
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From my testing, it seems that Mavericks exhibits no problem, Ubuntu 12.04 gives a warning but still works, and Ubuntu 14.04 hangs. I don't know what is causing the problem, or why behavior is different across platforms.
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Oh. It actually hangs on my mac. Probably the default numpy and scipy version is different across platform. I am using scipy==0.14.0, numpy==1.8.2 on my mac.
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@mattloper Sorry I accidentally deleted the previous comment. In scipy 0.14.0, scipy.sparse.linalg.spsolve is filling nan if singular matrix is detected. See diff line 139 in scipy/scipy@2344e41
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Finally fixed this, by falling back to scipy.sparse.linalg.lsqr when warnings are fired (typically with a singular matrix). The problem is that when any single column of the Jacobian is all-zeros, the predicted hessian is non-invertable. Sometimes such zero-columns indicates user-error (optimizing over vars that don't affect output), other times not.
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Related Issues (20)
- Meet a error during installation, I use "python setup.py" to install chumpy, is it right?
- Confusion about beta_multiplier function in the dogleg implementation.
- Error in ptyhon3
- Cannot try demo 'show_tree' HOT 1
- show_tree does not work even after DEBUG = True
- Set specific stopping condition.
- What does `r` in `compute_r` refer to? HOT 1
- Setup.py fails for pip>=20.1 HOT 9
- Build fails with setuptools 50.0.0 HOT 2
- Optimizing for GPU HOT 2
- The nondeterministic computation order of Jacobian
- can not find 0.69 version
- New PyPI release without numpy imports HOT 2
- pip install chumpy------> ERROR mesage HOT 5
- AttributeError: module 'inspect' has no attribute 'getargspec'. Did you mean: 'getargs'? HOT 2
- The explicit call of gc.collect()
- Python 3.10 install error
- 'import chumpy' fails: ImportError: cannot import name 'bool' from 'numpy' HOT 4
- chumpy `setup.py` improperly imports pip causing installation failure when using PEP 517 HOT 2
- import Chumpy error HOT 2
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