Thanks Michael
I activated right now for the raster histogram plugin, I will give a look
to improve it according to your suggestions
Peppe
2018-06-06 14:07 GMT+02:00 Michaël Michaud <m.michael.mich...@orange.fr>:
> Hi Peppe,
>
> Interesting class, I did not know that *mean*, *variance *and *standard
> deviation* could be calculated incrementally in a single pass ;-)
>
> Currently, you can compute statistics against several double arrays in a
> cumulative way, but I'm not sure it is intentional (and not sure it gives
> expected results for all indicators).
>
> If it is not intentional, maybe an option woud be :
>
> public StatisticIndices {
>
> double indices1, indices2...
>
> (private ?) StatisticIndices() {
> // initialisation of indices (only those != 0.0 ?)
> }
>
> *static* *StatisticIndices* computeIndices(double[] array) {
> StatisticIndices indices = new StatisticIndices();
> // computation
> return indices;
> }
>
> }
>
> I found also a small problem with array 0, 1, 2 : probably because of the
> small size of the array, this leads to an IndexOutOfBoundException when it
> computes index75
>
> Michaël
>
> Le 05/06/2018 à 17:57, Giuseppe Aruta a écrit :
>
> I added the class on OJ5839, under com.vividsolutions.jump.util package
>
> 2018-06-05 17:53 GMT+02:00 Giuseppe Aruta <giuseppe.ar...@gmail.com>:
>
>> I starded to work on class es.unex.sextante.math.simpleStats.SimpleStats
>> (Sextante under GPL2) that I modified and extended for my purpose: a set of
>> statistic operations to be used on a (raster) histogram, The final project
>> is to add a raster histogram plugin to OJ
>> Peppe
>>
>> 2018-06-05 13:54 GMT+02:00 <edgar.sol...@web.de>:
>>
>>> right Mike, or simply placed alongside in that package.
>>>
>>> Peppe, did you create the class from scratch or where did you get the
>>> code, under which license?
>>>
>>> ..ede
>>>
>>>
>>> On 05.06.2018 13:52, Michaël Michaud wrote:
>>> > Hi Peppe,
>>> >
>>> > If it is a collection of pure static math methods with no dependency
>>> mabe it can take place in
>>> >
>>> > com.vividsolutions.jump.util.MathUtil
>>> >
>>> > Michaël
>>> >
>>> >
>>> > Le 05/06/2018 à 09:32, Giuseppe Aruta a écrit :
>>> >> Hi all,
>>> >> I am going to add a new class, "StatisticsIndices", which calculates
>>> position and statistics indices of an array of numbers.
>>> >> The following inidices will be available:
>>> >>
>>> >> count
>>> >> total sum
>>> >> max
>>> >> min
>>> >> mean
>>> >> 25 percentile
>>> >> median
>>> >> 75 percentile
>>> >> standard deviation
>>> >> coefficinet of variation
>>> >> root Mean Squared
>>> >> Skewness
>>> >> Kurtosis
>>> >>
>>> >> This class could be used for any array of number (an array formed by
>>> raster cell values from a RasterImageLayer , an array from numeric
>>> attributes from a Vector Layer).
>>> >> For this reason I would like to add this class into a general
>>> visible package.
>>> >> My idea is to create an "org.openjump.core.math" package into OJ tree.
>>> >> I would like to have your opinion.
>>> >> Best
>>> >> Peppe
>>> >>
>>> >>
>>> >>
>>> >> ------------------------------------------------------------
>>> ------------------
>>> >> Check out the vibrant tech community on one of the world's most
>>> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>> >>
>>> >>
>>> >> _______________________________________________
>>> >> Jump-pilot-devel mailing list
>>> >> Jump-pilot-devel@lists.sourceforge.net
>>> >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>>> >
>>> >
>>> >
>>> > ------------------------------------------------------------
>>> ------------------
>>> > Check out the vibrant tech community on one of the world's most
>>> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > Jump-pilot-devel mailing list
>>> > Jump-pilot-devel@lists.sourceforge.net
>>> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>>> >
>>>
>>>
>>> ------------------------------------------------------------
>>> ------------------
>>> Check out the vibrant tech community on one of the world's most
>>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>> _______________________________________________
>>> Jump-pilot-devel mailing list
>>> Jump-pilot-devel@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>>>
>>
>>
>
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>
>
>
> _______________________________________________
> Jump-pilot-devel mailing
> listJump-pilot-devel@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>
>
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Jump-pilot-devel mailing list
> Jump-pilot-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Jump-pilot-devel mailing list
Jump-pilot-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
