[GRASS-user] Regarding issues with v.class.mlpy and v.class.ml

GRASS GRASS user
1

Date: December 01, 2014

Hi all,

I am a new Grass user and am trying to use it (through the windows GUI) for OBIA analyses - following the method described by Mr. Lennart in his shell script:

http://lists.osgeo.org/pipermail/grass-dev/2013-October/066181.html

Problem history: I am stranded at the last step (which requires usage of v.class.mlpy add-on extension). I asked the question before and got some lead from Mr. Nikos and Mr. Pietro (thanks again!) - install Scikit-learn library and so on. I installed all the associated libraries. However, I could not solve the problem due to my limited knowledge of Python.

Current Problem: Sorry to ask for help again but I think the problem has morphed. Upon re installation of Grass 7.0 and 7.1 and the add-ons, the earlier error messages no longer appear (I am assuming some modifications were made). The latest error messages upon attempt to run the add-on references some files in the grass installation. I am attaching the error message for your reference.

I’ll appreciate it if anyone can explain the troubleshooting process in a step by step method (preferably with some screenshots, assuming the instructed person has no previous knowledge of Python or grass file architecture. My trainees and I are predominantly civil engineering graduates - with basic coding knowledge but zero exposure in python).

With kind regards,

Imtiaz

(attachments)

7.0_v.class.ml_Errormsg.txt (807 Bytes)
7.1_v.class.mlpy_Errormsg.txt (691 Bytes)

2

Hi Imtiaz,

On Mon, Dec 1, 2014 at 1:07 PM, iat bd <imtiazataher@gmail.com> wrote:

Current Problem: Sorry to ask for help again but I think the problem has
morphed. Upon re installation of Grass 7.0 and 7.1 and the add-ons, the
earlier error messages no longer appear (I am assuming some modifications
were made). The latest error messages upon attempt to run the add-on
references some files in the grass installation. I am attaching the error
message for your reference.

I'll appreciate it if anyone can explain the troubleshooting process in a
step by step method (preferably with some screenshots, assuming the
instructed person has no previous knowledge of Python or grass file
architecture. My trainees and I are predominantly civil engineering
graduates - with basic coding knowledge but zero exposure in python).

From the error it seems like GRASS it is not able to generate the XML

that describe the v.class.ml module.
can you tray to execute from the grass terminal the command: v.class.ml --h

what is it the output?

in alterative you can move the working directory of your shell (cd
path/to/v.class.ml/code) in the same directory containing the
v.class.ml code ad execute the script using:
python v.class.ml.py write_your_options_here

All the best.

Pietro