Does 'i' after value stand for 'index', and if so why does it appear as part of the answer?
1 view (last 30 days)
Show older comments
Alexander Eaton
on 24 Mar 2018
Commented: Alexander Eaton
on 25 Mar 2018
I am trying to calculate the Euclidean distance between two images vectors of 4096 values that are contained in a file called allData (see pic) with the command:
Dist = sqrt(sum((allData(1) - allData(3) .^ 2)))
the answer that was returned was
0.0000 +19.1794i
does this answer seem correct or is the 'i' returned because im indexing into a matrix and im just getting returned one of the values from that image vector or am i being returned the distance between the two rows?
0 Comments
Accepted Answer
Roger Stafford
on 24 Mar 2018
Edited: Roger Stafford
on 24 Mar 2018
The 'i' in your result indicates a complex answer. I assume you are familiar with complex numbers. The 'i' represents the square root of minus one. This is caused by your attempt to take the square root of a negative number. Apparently allData(1) is less than the square of allData(3).
More Answers (0)
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!