Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Tanya
Posts:
4
Registered:
10/7/12


How to find the idx of different relative Min values
Posted:
Oct 7, 2012 11:14 AM


I have a matrix which looks like the following:
367 rows x 3 columns
Column 1 = Point ID (the ID of a point (the ID is a number between 18 and 7253) Column 2 = Group (The Group the point ID is associated with (Groups = number between 25  841) Column 3 = Distance ( The distance in pixels that the Point ID lies away from a specific vector (Distances = a number between 6  511)
I want to do the following: If the Group number occurs more than once, find the ID of the Point such that the distance is minimum.
I.e. if there are 3 points A B and C which all belong to Group 3 I am only interest in the Point with the smallest distance.



