I have a problem with an excel spreadsheet that i need help with...
I am studying a road network and it is represented by points (nodes) and the
space inbetween these is the road.
My problem is that obviously a road goes from say point A to point B but
also back the way from point B to point A. The data i have contains both data
from point A to point B but also from point B to point A. This data is
identical and to i'd like to delete the repeated data from B to A. The
problem is that point A may go to up to 5 other locations, ie to B,C,D,E or -
as roads do at a junction. Therefore there is a fair amount of repeated data
that i can see no way of deleting easily.

Can anyone help?

Calum.

Brief sample of data....
Node A Node B Length Speed
150 151 0.2 50
150 176 0.6 60
150 198 0.3 40
150 162 0.2 50
150 193 0.4 50
150 249 0.2 60
151 150 0.2 50
151 152 1.1 60
152 151 1.1 60
152 153 0.2 60
153 152 0.2 60
153 154 0.3 60
153 164 0.88 70
154 153 0.3 60
162 150 0.2 50
162 163 0.2 50
163 162 0.2 50
163 164 0.4 50
164 153 0.88 70
164 163 0.4 50
164 165 0.2 50
165 164 0.2 50
165 166 0.6 50
166 165 0.6 50
166 167 0.2 50
167 166 0.2 50
167 168 0.3 50
168 167 0.3 50
168 169 0.1 50
169 168 0.1 50
169 192 0.2 40
176 150 0.6 60
177 178 0.7 50
178 177 0.7 50
178 179 0.3 50
179 178 0.3 50
179 180 0.1 30
179 189 0.4 45