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Description:
User-support forum for discussions of how to use SciPy (www.scipy.org).
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Numpy 1.7.1 Crashing with MKL and AVX instructions
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I've tried posting this on the numpy list, but it keeps on getting bounced, so I'll try here: I found that when I went from numpy 1.7.0 to 1.7.1 I get a crash whenever I try an eigenvalue calculation (or any other linalg calculation) on matrices bigger than about 200x200. This happens with both the latest Anaconda and... more »
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MLE for discrete distributions: no fit() method on rv_discrete?
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Hi, I would like to find MLEs (and subsequently goodness of fit and so on) for empirical data against discrete distributions. I notice that scipy.stats.rv_discrete does not have the fit() method that scipy.stats.rv_continuous does. Is there a technical (either Pythonic or statistical) reason why not? If I roll my own am I going to get nonsense... more »
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CRF in Python
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Dear Group, I am looking for a Conditional Random Field implementation in Python. I tried Monte Python but not finding any good tutorial for it. Regards, Subhabrata.
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sqrtm is too slow for matrices of size 1000
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Hi, I am implementing spectral clustering for my course work and am using the sqrtm function to find the square root of a matrix . But its far too slow, my matrix is of size (1258,1258). Any suggestions on how I can speed things up or some other function that scipy supports which can be used. I am implementing the algorithm as described here:... more »
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HMM in Python
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Dear Group, I do not know whether it is an out of box question but as you are great scientific computing people so I thought to post it here. I am looking a simple example work out for forward probability of Hidden Markov Model(HMM) on the problem of sequence labelling. If any one can kindly help me out.... more »
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A NonLinearModelFit algorithm
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Hi All - I am very new to scipy so bare with me please :-) I have been using mathematica recently to mess around with my data. I have a method of calculating an x,y coordinate from 2 or more distance measurements coming from static devices (also x,y coords). The function I use to do this most effectively with the data I have is the... more »
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spectral derivative of aperiodic function
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I would like to calculate the spatial derivative of a variable defined on the points of a uniform grid. The domain is NOT periodic, so the FFT method is useless here. I wonder if there exist other spectral methods to calculate the derivative on an aperiodic domain or if my only hope is to use the finite difference method?... more »
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array indexing question
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I'm fairly new to this, so apologies in advance. Let's say I have a 3-d array A[i,j,k] of shape (Ni,Nj,Nk), and a list of labels I[k], where I[k] belongs to 0...Ni-1. I want to create a new, 2-d array B[j,k] = A[I[k], j, k]. I've found one solution to this, which is: ind_i = np.tile(I, (1,Nj)).T ind_j = np.tile(np.arange(Nj), (1,Nk))... more »
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