[R-sig-Geo] fuzzy kappa

[Paulo Flores Ribeiro]

Dear David,

Sorry for the late answer. Thanks for your help and suggestions. In the 
meantime, I found this work http://mck.riks.nl/ which I thought would 
answer my questions. I have already tried the "Map Comparison Kit 3" 
software and it seems to provide exactly what I was looking for. Still, 
it surprises me that something like this doesn't seem to exist in R.

Cheers,

PauloFR


Às 22:18 de 07/12/2021, David Hine escreveu:
> Dear List and Andrey and Paulo
>
> You might like to look at the Fuzme package at this link
> http://smartdigiag.com/software/#s-4.
>
> The notes on it say:
> /Fuzme is an R package for calculation of Fuzzy k-means with/without
> extragrades. I wanted to integrate fuzzy-k means into my R workflow so i
> translated some of Budiman Minansy’s matlab code into R. The R version
> of Fuzzy k-means with extragrades is a little buggy. The FuzME
> <http://sydney.edu.au/agriculture/pal/software/fuzme.shtml> software is
> more stable and efficient. I would recommend using that for most things.
> If you are trying to embed the classification into your R workflow
> though, the R packages is OK, but not as computationally efficient. I am
> working on it when i can./
>
> regards
>
> David
>
> On 24/11/2021 10:03 pm, David Hine (L WM) wrote:
>> Hi Andrey and Paulo
>> I reached out to the author of ithir package for his current advice. He may respond here if time permits.
>> cheers
>> David
>>
>> ⁣Sent from TypeApp ​
>>
>> On 24 Nov. 2021, 21:10, at 21:10, Paulo Flores Ribeiro<paulo.flores.mail using gmail.com>  wrote:
>>> Thank you Andrey,
>>> I peeked at the goofcat and saw that it has a function to calculate
>>> kappa, but it seems to be just "normal" kappa (in the sense of Cohen's
>>> Kappa) and not Fuzzy Kappa.
>>> Thanks anyway,
>>> PauloFR
>>>
>>>
>>> Às 16:47 de 23/11/2021, Андрей Чинилин escreveu:
>>>> Well, I could be wrong, but I suspect, that you can try "goofcat"
>>>> function from "ithir" package.
>>>> Link to pkg -https://bitbucket.org/brendo1001/ithir/src/master/.
>>>> Andrey
>>>> 23.11.2021, 18:03, "Paulo Flores Ribeiro"
>>> <paulo.flores.mail using gmail.com>:
>>>>       According to Hagen‐Zanker (2009:
>>>>       https://doi.org/10.1080/13658810802570317), «The Fuzzy Kappa
>>> statistic
>>>>       expresses the agreement between two categorical raster maps. The
>>>>       statistic goes beyond cell‐by‐cell comparison and gives partial
>>> credit
>>>>       to cells based on the categories found in the neighborhood.»
>>>>
>>>>       Does anyone know of a package/function to compute such a Fuzzy
>>> Kappa
>>>>       statistic in R?
>>>>
>>>>       Thanks in advance,
>>>>
>>>>       PauloFR
>>>>
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>>>>
>>>> --
>>>> С уважением,
>>>> Андрей Чинилин
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