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Cross Distance Operator
abdul_wahab
Member Posts: 2 
Contributor I
Hi,
I have a training File with 14 instances (All attributes are nominal )from which I sample one instance and use the cross distance Operator;
Correct me if I am wrong , that the Distance function is only applied on regular attribute and not on special attributes e.g label , id
Second Question:
After this If I choose Nominal Measure and Nominal Distance , for the same Instance it gives me 0 which I absolutely Understand
but When I choose Measure type as Nominal Measures and nominal Measure as Simple Matching SImilarity , I get -1 , why is it so ?
and Please suggest the best way of Visualization of Distance Measuring.
Waiting for reply
I have a training File with 14 instances (All attributes are nominal )from which I sample one instance and use the cross distance Operator;
Correct me if I am wrong , that the Distance function is only applied on regular attribute and not on special attributes e.g label , id
Second Question:
After this If I choose Nominal Measure and Nominal Distance , for the same Instance it gives me 0 which I absolutely Understand
but When I choose Measure type as Nominal Measures and nominal Measure as Simple Matching SImilarity , I get -1 , why is it so ?
and Please suggest the best way of Visualization of Distance Measuring.
Waiting for reply
0
Answers
yes your assumption is correct.
Well if you want to convert a similarity into a distance you have two choices: Either use the formular: distance = 1 / similarity which will deform your scale or accept that you have negative distances and use distance = (-1) * similarity. Which will fulfill the order and no not affect the scale.
The best way for visualizing depends on your task. And I guess that this now starts to become more consulting that free support.
Greetings,
Sebastian