how_to:computefalsepositiverate
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| ====== How-to compute False Positive Rate ====== | ====== How-to compute False Positive Rate ====== | ||
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| + | See [[userguide:falsepositiverate|here]] to have more details about False Positive Rate calculation. | ||
| ===== Run the False Positive Rate algorithm ===== | ===== Run the False Positive Rate algorithm ===== | ||
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| - Result can also be retrieved in the Context properties: \\ {{:how_to:falsepositiveratepropertiesgood.png|}} | - Result can also be retrieved in the Context properties: \\ {{:how_to:falsepositiveratepropertiesgood.png|}} | ||
| - | ===== More details about the False Positive Rate results ===== | ||
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| - | The Formula used to compute False Positive Rate is: | ||
| - | * **FPR = ∑FP/(∑TP+∑FP) ** | ||
| - | * with FP = (2*reverse). This FP value is get from the "significant.and.duplicated.fp" identification property. | ||
| - | * with TP = (reverse+forward) - FP. This TP value is get from the "significant.and.duplicated.tp" identification property. | ||
| - | * ∑FP represents the sum of all "significant.and.duplicated.fp" values (i.e. the sum of the "significant.and.duplicated.fp" property of all identifications under the context) | ||
| - | * ∑TP represents the sum of all "significant.and.duplicated.tp" values (i.e. the sum of the "significant.and.duplicated.tp" property of all identifications under the context) | ||
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| - | :!: **The user can retrieve the significant.and.duplicated.fp and significant.and.duplicated.tp of all the identifications in the log.** | ||
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| - | {{:how_to:falsepositiverateresultwithzero.png |}} | ||
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| - | If one (or more) identification contains a zero value for one or both properties, \\ | ||
| - | this identification is not taken into account in the calculation.\\ | ||
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| - | For example, in the screen shot on the left, you can read that 895 out of 959 identifications were used for the calculation.\\ | ||
| - | \\ | ||
| - | The user is informed about this in the resulting dialog message **and** in the context properties: | ||
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| - | {{:how_to:falsepositiveratepropertieswithzero.png|}} | ||
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| - | ===== Read the False Positive Rate result ===== | ||
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| - | You can see computed False Positive Rate in the Context properties: | ||
| - | - Select the User context for which FPR has already been computed | ||
| - | - Right-click on the selected context and select ''Properties'' | ||
| - | - The False Positive Rate appears under the "false positive" category: | ||
| - | * significant.and.duplicated.rate is the rate in percentage. | ||
how_to/computefalsepositiverate.1330365089.txt.gz · Last modified: 2012/02/27 18:51 by 132.168.73.124
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