[R-sig-Geo] Risks as hazardous (false positive) and safe (false negative)

[Zia Ahmed]

Thanks!  I may correct the values those are out side [0,1] using pmin 
and pmax function (?).
But  I am sill not clear how I will do this.
 Thanks again

Zia


Edzer Pebesma wrote:
> (replying to the list)
>
> Well, if you're willing to accept the indicator kriging values as
> estimates of these probabilities, you're essentially done. Of course,
> the kriged values can be outside [0, 1], so you need to deal with that.
>
> Best regards,
> --
> Edzer
>
> Zia Ahmed wrote:
>   
>> Dear Edzer,
>>
>> Thanks for your replay. I have done IK of water arsenic using
>> quantiles of the data. I want to do   miss classification  of my risk
>> that  proposed  by  Goovaerts.
>> Two misclassification  of risks are proposed by Goovaerts (1997) based
>> on ccdf model F(*u*;z_k |(n)) of Z(*u*)?Z_k .
>>
>>
>> 1.       The risk ?(*u*) of incorrectly classified a location u as
>> hazardous (false positive):
>>
>> ?(*u*) = Prob{Z(*u*) ?z_c |z*_L (u) > Z_c , (n)}
>>
>>        = F(*u*;z_c |(n))
>>
>> Where z*_L (u) is the estimator.
>>
>> 2.       The risk ?(u)  wrongly classified a location u as safe (false
>> negative)
>>
>> ?(*u*) = Prob{Z(*u*) > z_c |z*_L (u) ? Z_c , (n)}
>>
>>       = 1- F(*u*;z_c |(n))
>>
>>
>>
>>
>>
>> Ref: Goovaerts, P (1997). Geostatistics for Natural Resource
>> Evaluation, pp: 259-368
>>
>>
>>
>> Zia
>>
>> Edzer Pebesma wrote:
>>     
>>> Dear Zia,
>>>
>>> If you mean by Goovaerts (1997) his 483 page book "Geostatistics for
>>> Natural Resource Evaluation", then please give us a bit more precise
>>> detail on what you want (which page? which equation?)
>>> -- 
>>> Edzer
>>>
>>> Zia Ahmed wrote:
>>>  
>>>       
>>>> Hi all,
>>>>
>>>> Is it possible in gstat to get misclassification  of risks as
>>>> hazardous (false positive) and safe (false negative) as describe by
>>>> Goovaerts (1997)  from parametric or non-parametric probability
>>>> mapping?.  help will appreciated.
>>>>
>>>> Thanks
>>>>
>>>> Zia
>>>>
>>>>
>>>>     
>>>>         
>>>   
>>>       
>
>   
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