Update documentation for xtract_lnorm()

1 files changed, 1 insertions, 1 deletions

diff --git a/xtract/xtract_delta.h b/xtract/xtract_delta.h
index 9c0882c..c7b3ee7 100644
--- a/xtract/xtract_delta.h
+++ b/xtract/xtract_delta.h
@@ -51,7 +51,7 @@ int xtract_flux(const double *data, const int N, const void *argv , double *resu
  *
  * \param *data: a pointer to the first element in an array of doubles representing the difference between two subsequent frames of output from a vector-based feature e.g. the *result from xtract_difference_vector()
  * \param N: the length of the array pointed to by *data
- * \param *argv: a pointer to an array of doubles, the first representing the "norm order". The second argument represents the filter type determining what values we consider from the difference vector as given in the enumeration xtract_lnorm_filter_types_ (libxtract.h)
+ * \param *argv: a pointer to an array of doubles, the first representing the "norm order". The second argument represents the filter type determining what values we consider from the difference vector as given in the enumeration xtract_lnorm_filter_types_ (libxtract.h), the third sets whether we want the result to be normalised in the range 0-1 (0 = no normalise, 1 = normalise)
  * \param *result: a pointer to a double representing the flux
  *
  */