databionic-esom-user

[Databionic-ESOM-User] Number precision in ESOM DB tool

[Slimane O. N. <oul...@ya...>]

hi,
by this mail, i notice you the problem of number precision in
your tool. my data set include vectors of numbers with 6 digits after the decimal
separator. but if i 'm correct the tool load the data truncated only to
3 digits decimals precision (ex: 0.001452 is represented as 0 !).
i expose this pb, hope for any guides 
thanks in advances


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Re: [Databionic-ESOM-User] Number precision in ESOM DB tool

[Niko E. <ne...@ne...>]

On  0, Slimane OULAD NAOUI <oul...@ya...> wrote:
> hi,
> by this mail, i notice you the problem of number precision in
> your tool. my data set include vectors of numbers with 6 digits after the decimal
> separator. but if i 'm correct the tool load the data truncated only to
> 3 digits decimals precision (ex: 0.001452 is represented as 0 !).
> i expose this pb, hope for any guides 
> thanks in advances

Hi,

unfortunately I can't help you much, but the place where you may want to
look is LrnFile.java.

Other than this, ESOM works best with data normalized to the interval
[-1,1]. The is a z-transform tool somewhere in the GUI that can do this
for you.

Greets Niko

Re: [Databionic-ESOM-User] Number precision in ESOM DB tool

[Fabian M. <fa...@my...>]

Hi,

can you please explain why you think only 3 digits would be supported?
The IO classes use the standard java.text.NumberFormat for parsing.
This is initialized with the local of your Java virtual machine. Maybe
there are some problems with the configuration of your JVM?

fabian

P.S. z-transform projects to zero mean and unit variance, not [-1, 1] (which
is available as well).

Niko Efthymiou wrote:
> On  0, Slimane OULAD NAOUI <oul...@ya...> wrote:
>   
>> hi,
>> by this mail, i notice you the problem of number precision in
>> your tool. my data set include vectors of numbers with 6 digits after the decimal
>> separator. but if i 'm correct the tool load the data truncated only to
>> 3 digits decimals precision (ex: 0.001452 is represented as 0 !).
>> i expose this pb, hope for any guides 
>> thanks in advances
>>     
>
> Hi,
>
> unfortunately I can't help you much, but the place where you may want to
> look is LrnFile.java.
>
> Other than this, ESOM works best with data normalized to the interval
> [-1,1]. The is a z-transform tool somewhere in the GUI that can do this
> for you.
>
> Greets Niko
>
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