[Mne_analysis] Mne_analysis Digest, Vol 117, Issue 36

Tue Oct 31 10:25:22 EDT 2017

Dear Chris,

Thank you for response. I should have been more clear. I indeed always create virtual environments first before installing specific packages.
I first created a specific mne environment with the following code:

conda create -n mne python=2.7 anaconda
source activate mne 

I then tried to install mne using the conda install and pip install lines as specified on your website. However, I then still get the mayavi installation error. Is it then still possible that my virtual environment has an old version of QT?

Thank you,

Dirk

> On 31 Oct 2017, at 14:57, mne_analysis-request at nmr.mgh.harvard.edu wrote:
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> Today's Topics:
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>   1. Problem installing mayavi (Dirk van Moorselaar)
>   2. Re: Problem installing mayavi (Christopher Bailey)
> 
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> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 31 Oct 2017 11:18:08 +0100
> From: Dirk van Moorselaar <dirkvanmoorselaar at gmail.com>
> Subject: [Mne_analysis] Problem installing mayavi
> To: mne_analysis at nmr.mgh.harvard.edu
> Message-ID: <E03AC13F-B2C4-486D-ABF5-9A3E73643AFB at gmail.com>
> Content-Type: text/plain; charset="us-ascii"
> 
> Hello,
> 
> Yesterday I mailed that I had troubles using raw.plot (Subject: problem scrolling trough data using raw.plot). I realised that this might have had something todo with the way I installed mne. To install mne I followed the instructions on the website. I installed anaconda and then tried to execute the following lines.
> 
> $ conda install scipy matplotlib scikit-learn mayavi jupyter spyder
> $ pip install PySurfer mne
> However, installing mayavi resulted in the following error:
> 
> Fetching package metadata .............
> Solving package specifications: .
> 
> UnsatisfiableError: The following specifications were found to be in conflict:
>  - mayavi
>  - navigator-updater
>  - pywavelets
> 
> To circumvent this error I installed mne without installing Pysurfer and mne. I was wondering whether this could explain the problem I encountered with raw.plot.
> 
> Thanks,
> 
> Dirk
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> ------------------------------
> 
> Message: 2
> Date: Tue, 31 Oct 2017 13:57:16 +0000
> From: Christopher Bailey <cjb at cfin.au.dk>
> Subject: Re: [Mne_analysis] Problem installing mayavi
> To: Discussion and support forum for the users of MNE Software
> 	<mne_analysis at nmr.mgh.harvard.edu>
> Message-ID: <7722BF52-2E1F-4222-842E-017031978F6E at cfin.au.dk>
> Content-Type: text/plain; charset="utf-8"
> 
> Hi Dirk,
> 
> Looks like you?re installing those packages directly into the ?root? environment under Anaconda. In general, it?s highly recommended that you create environments for specific needs. In your case, you could try
> 
> conda create -n mne python=2 pip
> 
> for bare python 2. Then activate the environment (Win: activate mne; linux/osx: source activate mne), and re-run the conda install and pip lines you posted. The problem you are facing is related to mayavi and thereby PySurfer depending on an old version of Qt.
> 
> Alternatively, you could try your luck with the environment definition file shipped with mne-python:
> 
> conda env create -f environment.yml
> 
> from https://github.com/mne-tools/mne-python/blob/master/environment.yml which works for me (OS X). Consider this ?experimental?, though (installs python 3).
> 
> Read more about conda environments here: https://conda.io/docs/user-guide/tasks/manage-environments.html
> 
> /Chris
> 
> On 31 Oct 2017, at 11.18, Dirk van Moorselaar <dirkvanmoorselaar at gmail.com<mailto:dirkvanmoorselaar at gmail.com>> wrote:
> 
> Hello,
> 
> Yesterday I mailed that I had troubles using raw.plot (Subject: problem scrolling trough data using raw.plot). I realised that this might have had something todo with the way I installed mne. To install mne I followed the instructions on the website. I installed anaconda and then tried to execute the following lines.
> 
> 
> $ conda install scipy matplotlib scikit-learn mayavi jupyter spyder
> $ pip install PySurfer mne
> 
> However, installing mayavi resulted in the following error:
> 
> Fetching package metadata .............
> Solving package specifications: .
> 
> UnsatisfiableError: The following specifications were found to be in conflict:
>  - mayavi
>  - navigator-updater
>  - pywavelets
> 
> To circumvent this error I installed mne without installing Pysurfer and mne. I was wondering whether this could explain the problem I encountered with raw.plot.
> 
> Thanks,
> 
> Dirk
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