Mailman 3 June 2016 - scikit-learn

KMeans with cosine similarity
by JAGANADH G June 2, 2016

June 2, 2016

Hi Team, I was trying to use cosine similarity with KMeans. The code which I used to achieve is available here. https://gist.github.com/jaganadhg/b3f6af86ad99bf6e9bb7be21e5baa1b5 Is it the right way to achieve the same ? I know that cosine is not directly supported in sklearn KMeans. But after skimming through the code I was thinking that this will work ;-) -- ********************************** JAGANADH G http://jaganadhg.in *ILUGCBE* http://ilugcbe.org.in

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Fwd: ValueError
by Ruchika Nayyar June 2, 2016

June 2, 2016

Thanks, Ruchika ---------------------------------------- Dr Ruchika Nayyar, Post Doctoral Fellow for ATLAS Collaboration University of Arizona Arizona, USA. -------------------------------------------- ---------- Forwarded message ---------- From: <scikit-learn-owner(a)python.org> Date: Wed, Jun 1, 2016 at 10:23 AM Subject: ValueError To: ruchika.work(a)gmail.com This list allows posts by subscribers only. Please subscribe at https://mail.python.org/mailman/listinfo/scikit-learn to post to the list. ---------- Forwarded message ---------- From: Ruchika Nayyar <ruchika.work(a)gmail.com> To: scikit-learn(a)python.org Cc: Date: Wed, 1 Jun 2016 10:23:14 -0700 Subject: ValueError Hi I am new to scikit-learn and while writing a python script to do a simple BDT using scikit-learn. I see error when I do this: from sklearn import datasets Traceback (most recent call last): File "bdt.py", line 12, in <module> from sklearn import datasets File "/Library/Python/2.7/site-packages/sklearn/__init__.py", line 57, in <module> from .base import clone File "/Library/Python/2.7/site-packages/sklearn/base.py", line 11, in <module> from .utils.fixes import signature File "/Library/Python/2.7/site-packages/sklearn/utils/__init__.py", line 10, in <module> from .murmurhash import murmurhash3_32 File "numpy.pxd", line 155, in init sklearn.utils.murmurhash (sklearn/utils/murmurhash.c:5029) ValueError: numpy.dtype has the wrong size, try recompiling I have already tried to uninstall numpy/scipy and pandas. They all are the latest and compatible version but something is not right. Can you tell me what I am doing wrong? Thanks, Ruchika ---------------------------------------- Dr Ruchika Nayyar, Post Doctoral Fellow for ATLAS Collaboration University of Arizona Arizona, USA. --------------------------------------------

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Artificial neural network not learning lower values of the training sample
by muhammad waseem June 1, 2016

June 1, 2016

Hi All, I am trying to train an ANN but until now it is not learning the lower values of the training sample. I have tried using different python libraries to train ANN. The aim is to predict solar radiation from other weather parameters (regression problem). I think the ANN is confusing lower values (winter/cloudy days) with the night-time values (probably). I have tried the following but none of them worked; 1. Scaling data between different values e.g. [0,1],[-1,1] 2. Standardising data to have zero mean and unit variance 3. Shuffling the data 4. Increasing the training samples (from 3 years to 10 years) 5. Using different train functions 6. Trying different transfer functions 7. Using few input variables 8. Varying hidden layers and hidden layers' neurons Any idea what could be wrong or any directions to try? Thanks Kindest Regards Waseem

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