Matching Co-Ordinates

[deusextra]

Hello.

I'm looking to devise a method of using VBA to match x and y co-ordinates to the nearest match.

E.g.

Match the following co-ordinates to the most similar:

x = 59, y = 42

a) x = 52, y = 47
b) x = 51, y = 49
c) x = 58, y = 43

In this case c would be the nearest match.

Can anyone suggest a way to do this on Excel using VBA or any other method?

Thanks!

[deusextra]

I know the algorithm I need to write...


X and Y co-ordinates are both defined by a number between 0 and 999,999.
I need to find all X co-ordinates within 100 of the given X co-ordinate.
From these results I then need to find the nearest Y co-ordinate.
This is done by finding the lowest (absolute value of given Y co-ordinate minus each of the remaining individual Y values).
When this is found the corresponding unique identifier for the pair of co-ordinates identified is returned.

An example would be:



I'm given the co-ordinates X(250,000), Y(220,000)


The following subset is returned (within 100 of given X co-ordinate)


ID1: X(250,040), Y(120,000)
ID2: X(250,020), Y(320,000)
ID3: X(250,050), Y(215,000)




Then the absolute value between given and found Y co-ordinates would be


120,000 - 220,000 = ABS(-100,000)
320,000 - 220,000 = ABS(100,000)
215,000 - 220,000 = ABS(-5,000)




Therefore, based on the rules of the algorithm the result given would be



ID3: X(250,050), Y(215,000)


Does anyone know how to translate this into code?

[snb]

Since this is an Excel forum why not posting a sample Excel file ?