How do I get the closest set of numbers to a given set of numbers in C#?

Question

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I have a set of numbers:

A B C D E F G
10 3 6 8 22 10 34

The above set of numbers are in a class named, 'Range':

class
{
int A;
int B;
int C;
int D;
int E;
int F;
int G;
}

I also have a list of type <range> which contains more 'Range' typed objects.

Example:

List<Range> objects = new List<Range>();

And let's say we have 2 ranges added in this list:

15, 1, 2, 10, 40, 1, 33
0, 0, 100, 0, 2, 1, 34

Now I need to find the ranges with the closest values to the Range I first mentioned, which is:

A B C D E F G
10 3 6 8 22 10 34

I need to find the range that has the closest range to the range mentioned above by comparing each Letter value to the required range's respective value. In this case, 15, 1, 2, 10, 40, 1, 33 is the best option since most of its values are closer to the values of the required range than the second option.

How can I do this folks?

Posted 3-Apr-15 17:59pm

Dinuka Jayasuriya

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Comments

Sergey Alexandrovich Kryukov 4-Apr-15 1:35am

The problem is not completely defined. Define "closest".
given 1, 2, 3, 4, which is the closest
1, 3, 4, 4
or
1, 2, 3, 5?
Don't show example, provide strict comprehensive definition.
Anyway, what have you tried so far?
—SA

1 solution

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George Swan · Accepted Answer · 2015-04-03T19:55:00

Solution 1

Here is a suggestion. Subtract each field in the test Range from the corresponding field in the target Range. Take the absolute value of each result and sum them. The Range with the smallest total wins. The absolute value of x can be found using Math.Absolute(x) . A more sophisticated method would be to express the absolute value as a percentage of the maximum possible value of that field.

Posted 3-Apr-15 19:55pm

George Swan

Updated 3-Apr-15 19:56pm

v2

Comments

Dinuka Jayasuriya 4-Apr-15 3:16am

Yes this is what I tried. Thank you!

BillWoodruff 4-Apr-15 4:41am

+5