[IPython-User] numerical inaccuracy on osx (notebook)

K.-Michael Aye kmichael.aye@gmail....
Fri Jun 28 12:15:53 CDT 2013


On 2013-06-24 18:09:21 +0000, epi said:

> Matthias,
> 
> i removed "all" the ipython installation i found on my system (system 
> python, brew python)

Epi,

Be prepared for some problems to appear after having removed the system 
python, because some of OSX system utilities use the system python for 
OS tasks! (I don't know which ones, but I am pretty sure that's true)

Michael


> 
> then i reinstalled ipython with pip  (pip install -U ipython)
> 
> which ipython
> /usr/local/share/python/ipython
> 
> ipython --version
> 0.13.2
> 
> 
> testing in the notebook  the lines :
> 
> import numpy as np
> url='http://www.cdc.noaa.gov/Correlation/amon.us.long.data'
> data = np.genfromtxt(url, skip_header=1, skip_footer=4)
> 
> data[:, 1:][0]
> 
> array([ 0.22 ,  0.153,  0.224,  0.143,  0.196,  0.218,  0.232,  0.209,
>         0.276,  0.126,  0.136,  0.23 ])
> 
> from the url :   http://www.cdc.noaa.gov/Correlation/amon.us.long.data
> 
> the first row is :
> 
> 1856    0.220    0.153    0.225    0.144    0.196    0.219    0.232    
> 0.209    0.276    0.126    0.137    0.231
> 
> 
> I think the problem is in the notebook + bumpy/pylab  can be possible ?
> because in the notebook the pandas example work just fine (same results 
> between notebook and shell/qtconsole)
> or something related to my locale / system profiles / ipython config ?
> 
> 
> 
> i tried to open the qtconsole from inside the notebook "  %qtconsole magic "
> and i got the same problem.
> 
> attached a screenshot [1]
> on the left the ipython shell and qt console running from the bash command line
> on the right the notebook and qt console running from the qtconsole magic
> 
> [1] http://geofemengineering.it/logs/test_np.png
> 
> 
> Il giorno 24/giu/2013, alle ore 13:09, Matthias BUSSONNIER 
> <bussonniermatthias@gmail.com> ha scritto:
> 
>> 
>> Le 24 juin 2013 à 19:00, epi a écrit :
>> 
>>> Hi Matthias,
>> 
>> Hi Massimo,>>>>> i do not have EPD/ANACONDA installed.
>>> i'm  running homebrew python with ipython installed from source (GIT master)
>> 
>> Does the same happened if you start qtconsole from the notebook with 
>> the %qtconsole magic ?
>> I'm really astonished about how qtconsole  and notebook could differ.
>> -- 
>> Matthias
>> 
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