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POComparing lists of integers and then ordering them based on similarity.
 

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  1. POComparing lists of integers and then ordering them based on similarity.
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    <p>I have a list of players that each contain a list of skill ratings. What I am trying to do is order those players based on the ratings matched to a specific search list.</p> <p>Here is an example of four players:</p> <pre><code> List&lt;Skill&gt; skillsA = new List&lt;Skill&gt;(); List&lt;Skill&gt; skillsB = new List&lt;Skill&gt;(); List&lt;Skill&gt; skillsC = new List&lt;Skill&gt;(); List&lt;Skill&gt; skillsD = new List&lt;Skill&gt;(); skillsA.Add(new Skill() { Name = "Speed", Value = 1 }); skillsA.Add(new Skill() { Name = "Agility", Value = 5 }); skillsA.Add(new Skill() { Name = "Strength", Value = 3 }); skillsA.Add(new Skill() { Name = "Endurance", Value = 4 }); skillsB.Add(new Skill() { Name = "Speed", Value = 5 }); skillsB.Add(new Skill() { Name = "Agility", Value = 2 }); skillsB.Add(new Skill() { Name = "Strength", Value = 1 }); skillsB.Add(new Skill() { Name = "Endurance", Value = 3 }); skillsC.Add(new Skill() { Name = "Speed", Value = 5 }); skillsC.Add(new Skill() { Name = "Agility", Value = 3 }); skillsC.Add(new Skill() { Name = "Strength", Value = 2 }); skillsC.Add(new Skill() { Name = "Endurance", Value = 2 }); skillsD.Add(new Skill() { Name = "Speed", Value = 1 }); skillsD.Add(new Skill() { Name = "Agility", Value = 2 }); skillsD.Add(new Skill() { Name = "Strength", Value = 5 }); skillsD.Add(new Skill() { Name = "Endurance", Value = 4 }); Player A = new Player() { Skills = skillsA }; Player B = new Player() { Skills = skillsB }; Player C = new Player() { Skills = skillsC }; Player D = new Player() { Skills = skillsD }; </code></pre> <p>This would be the search list I compare to:</p> <pre><code> List&lt;Skill&gt; matchSkill = new List&lt;Skill&gt;(); matchSkill.Add(new Skill() { Name = "Speed", Value = 5 }); matchSkill.Add(new Skill() { Name = "Agility", Value = 2 }); matchSkill.Add(new Skill() { Name = "Strength", Value = 1 }); matchSkill.Add(new Skill() { Name = "Endurance", Value = 1 }); SkillSearch SkillSearch = new SkillSearch() { Skills = matchSkill }; </code></pre> <p>I should get back a list of players ordered PlayerB, PlayerC, PlayerD, PlayerA</p> <p>The skill lists will always be the same size and in the same order. The skills always range from 1-5. I have tried comparing the difference between the values using absolute value. For example if a search is for a (3) 2 and 4 would be a closer match than 1 or 5.</p> <p>In short if you just look at them as numeric array's you would have:</p> <pre><code> search = { 5, 2, 1, 1} playerb = { 5, 2, 1, 3} : difference {0,0,0,2} (2 total) playerc = { 5, 3, 2, 2} : difference {0,1,1,1} (3 total) playerd = { 1, 2, 5, 4} : difference {4,0,4,3} (11 total) playera = { 1, 5, 3, 4} : difference {4,3,2,3} (12 total) </code></pre> <p>How would I order these using C#? I would prefer a linq result. I am just not sure how to get these to order.</p>
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    1. COSorry for some reason I forgot to add the question...
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    2. COSeems like you have chosen Manhattan Distance as your distance measure. Well, what's the problem? You need to calculate the sum of absolute differences between two sets of skills and rank them by lowest distance.
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      1. USAndreas
 

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