Re: [Fwd: Re: [Databionic-ESOM-User] ESOM]

[<mit...@we...>]

Dear Mr. Mörchen and Mr. Efthymiou  ,
I really appreciate your response which did help me understand and make
clear some things but I still have some questions and problems with ESOM.

I tried to follow the steps of your guidelines but I have some questions.

- create two seperate *.lrn for training and test data

ok but does the training test data have to include a column with the class
of each sample or it is the same with having a separate .cls file. (in
some example .lrn files there is a column for the class of the data)
Is it necessary one of the fields of the .lrn file to be labeled as unique
key (9)?

-train ESOM with training data
ok

 - optional: load *.cls with known classification of training data
the *.cls file should be loaded before or after the training process. (I
suppose before)
It is loaded from the tab classes or class mask?

> - identify clusters and create class mask (also *.cls)
how do I identify clusters?? and create class mask?
Do I use the classify selection from the tools menu?
for some reason it doesn't seem to work although I press the start button
the procedure thoes not start and no output .cls file is created.

 - load *.lrn with test data
ok
> - project this data on ESOM
ok
> - save newly created *.cls for test data
How do I create the new *.cls data

> - optional: analyze *.cls for test data, e.g. compare to *.cls with
> known classification of test data.

I would really appreciate it if you could give me answer in my questions.
It very very important for me.

I really admire your work.
Looking forward for your response and your future work.

Please reply to me to this e-mail address mit...@un...
Not the address that I am currently send you this e-mail, because I won’t
receive it.

Thank you in advance.

Katerina






>> @fabian could you please set the reply-to headers for the list?
>
> done
>
>> Katerina Mitrokotsa wrote:
>>
>>>I have recently tried to use ESOm and although I have found it really
>>> interesting I can't understand if there is a way to inspect neuron
>>> values Does this tool permit us to see which samples of data
>>> correspond to which neuron?
>>
>>
>> You can select the samples in the Data tab at the bottom, which are
>> then highlighted.
>
> addition: you can also select neurons in the map with the data mouse
> (activate the leftmost icon in the toolbar). the data points assigned to
> these neurons will be displayed in the data tab at the bottom. you can
> also load a *.names file with text labels for the data points. these
> will be displayed in the last columns of the data table.
>
>>>Furthermore which is the procedure in order to use a dataset for
>>> training and then another dataset for testing.
>>
>> To do this you have to add classmasks to your ESOM and then use the
>> Project tool to see if the test set is projected into the correct
>> classes. The prosses isn't automated as far as i know (fabian?)
>
> creating the class masks is manual (in cvs there is some semi-automated
> support with flood filling already). projection is automated and can be
> run via the menu or the command line. short summary:
>
> - create two seperate *.lrn for training and test data
> - train ESOM with training data
> - optional: load *.cls with known classification of training data
> - identify clusters and create class mask (also *.cls)
> - load *.lrn with test data
> - project this data on ESOM
> - save newly created *.cls for test data
> - optional: analyze *.cls for test data, e.g. compare to *.cls with
> known classification of test data.
>
> we offer no tools for the last step which is rather easy however. i
> could post some matlab code, if you wish.
>
> bye
> fabian
>
>
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