====== How-to compute False Positive Rate ======

See [[userguide:falsepositiverate|here]] to have more details about False Positive Rate calculation.

===== Run the False Positive Rate algorithm =====
{{ :how_to:falsepositiveratemenu.png|}}
:!: **Required condition to run the False Positive Rate algorithm:**

  * **Selected User context must be grouped**

If above condition is respected, then follow these steps:

  - Select the User context for which you want to compute the FPR
  - Right-click on the selected context and select ''Algorithms->Compute False Positive Rate'' 
     * Or, from the main toolbar, select ''MS Identifications->Context->Algorithms->Compute False Positive Rate''  
  - A progress bar will appear on the screen \\ {{:how_to:falsepositiverategui.png|}}
  - When process is finished, a dialog message will appear to display the FPR in percentage: \\ {{:how_to:falsepositiverateresultgood.png|}}
  - Result can also be retrieved in the Context properties: \\ {{:how_to:falsepositiveratepropertiesgood.png|}}