diff options
Diffstat (limited to 'src/include/ndpi_api.h')
| -rw-r--r-- | src/include/ndpi_api.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/include/ndpi_api.h b/src/include/ndpi_api.h index 9200fcbf5..f834223c6 100644 --- a/src/include/ndpi_api.h +++ b/src/include/ndpi_api.h @@ -1948,6 +1948,29 @@ extern "C" { double ndpi_pearson_correlation(u_int32_t *values_a, u_int32_t *values_b, u_int16_t num_values); /* ******************************* */ + + /* + * Checks if a specified value is an outlier with respect to past values + * using the Z-score. + * + * @par past_valuea = List of observed past values (past knowledge) + * @par num_past_values = Number of observed past values + * @par value_to_check = The value to be checked with respect to past values + * @par threshold = Threshold on z-score:. Typical values: + * t = 1 - The value to check should not exceed the past values + * t > 1 - The value to check has to be within (t * stddev) boundaries + * @par lower - [out] Lower threshold + * @par upper - [out] Upper threshold + * + * @return true if the specified value is an outlier, false otherwise + * + */ + + bool ndpi_is_outlier(u_int32_t *past_values, u_int32_t num_past_values, + u_int32_t value_to_check, float threshold, + float *lower, float *upper); + + /* ******************************* */ u_int32_t ndpi_quick_16_byte_hash(u_int8_t *in_16_bytes_long); |