Timeline for Where does a ROC curve of a perfect classifier start?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| May 8, 2019 at 9:34 | history | edited | Calimo | CC BY-SA 4.0 |
$d$ not used anywhere else, remove to avoid confusion.
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| May 8, 2019 at 9:33 | comment | added | Calimo | @ErKanns $d$ is the data point $d_i \in D$. The threshold $t$ may or may not correspond to a value in $D$. There can be cases where lower values indicate a positive test, although that's less common. | |
| May 8, 2019 at 9:20 | comment | added | user247002 | I am sorry, what is d? The sentence "where higher data values d are indicative of positive results" seems to me to imply that you talk about the treshold but you call the treshold later on t. | |
| May 8, 2019 at 9:17 | comment | added | Calimo | @ErKanns No, D is your data, and t is the decision threshold you use to classify this data as positive or negative. | |
| May 8, 2019 at 9:11 | comment | added | user247002 | I am confused. t is the treshold if I get it right. But why does it say "where higher data values d are indicative of positive results" not "where higher data values t are indicative of positive results"? Also D is the set of all thresholds t? If so, why does it say that D∉±∞ if later we talk about (-) ∞ thresholds t? | |
| May 8, 2019 at 9:05 | history | edited | Calimo | CC BY-SA 4.0 |
Replace x with d to avoid confusion with x,y of plot.
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| May 8, 2019 at 8:56 | comment | added | Calimo | Ok the confusion here is that I am using x to refer to your data, and not the x in the plot. Let me rephrase it with an other letter like d for data. | |
| May 8, 2019 at 8:39 | comment | added | user247002 | You say In this case the mapping from a value x to a (FPR,TPR) is unique. This seems to contradict to the answer from boulder because in that answer one gets different y (TPR) values for the same x (FPR) value. But the arguments from boulder seem to be correct to me which makes me confused. | |
| May 7, 2019 at 19:51 | vote | accept | CommunityBot | ||
| May 7, 2019 at 20:09 | |||||
| May 7, 2019 at 19:06 | history | edited | Calimo | CC BY-SA 4.0 |
added 206 characters in body
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| May 7, 2019 at 18:40 | history | answered | Calimo | CC BY-SA 4.0 |