question: get the f-1 measure of the given class concode_field_sep Map<String,Map<String,Long>> linearizedMatrix concode_elem_sep int numberOfEvaluatedDocs concode_elem_sep double accuracy concode_elem_sep double avgClassificationTime concode_field_sep ConfusionMatrix getConfusionMatrix concode_elem_sep double getAccuracy concode_elem_sep Map<String,Map<String,Long>> getLinearizedMatrix concode_elem_sep double getRecall concode_elem_sep double getRecall concode_elem_sep String toString concode_elem_sep double getAvgClassificationTime concode_elem_sep int getNumberOfEvaluatedDocs concode_elem_sep double getPrecision concode_elem_sep double getPrecision
target: double function ( String arg0 ) { double loc0 = getRecall ( arg0 ) ; double loc1 = getPrecision ( arg0 ) ; return loc1 > 0 && loc0 > 0 ? 2 * loc1 * loc0 / ( loc1 + loc0 ) : 0 ; }