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POGetting relative frequency of each character in a string in java
 

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  1. POGetting relative frequency of each character in a string in java
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    <p>I wanted to get the average of each unique character in a string. I have an example here as it would be easier to illustrate it.</p> <p>String: </p> <pre><code>The big brown fox </code></pre> <p>Average of each character including spaces:</p> <pre><code>T = 1/17 = .058 h = 1/17 = .058 e = 1/17 = .058 ' '= 3/17 = .176 b = 2/17 = .117 i = 1/17 = .058 g = 1/17 = .058 r = 1/17 = .058 o = 2/17 = .117 w = 1/17 = .058 n = 1/17 = .058 f = 1/17 = .058 x = 1/17 = .058 </code></pre> <p>So far all my attempts have failed, think my brain is not working at the moment. How do I code this? Any help or input will be greatly appreciated. </p> <p>I have this code as a solution. It just came to me when I was copy pasting my code here in stack. I hope this is not a re-post because I just answered the same thing a few minutes ago but it didn't show up.</p> <pre><code> Map&lt;String, Integer&gt; storeCharCount = new HashMap&lt;String, Integer&gt;(); String a = "The big brown fox"; for (int x=0; x&lt;a.length(); x++){ char getChar = a.charAt(x); String convGetChar = Character.toString(getChar); Integer countChar = storeCharCount.get(convGetChar); storeCharCount.put(convGetChar, (countChar==null?countChar=1:countChar+1)); } System.out.println("Map: "+ storeCharCount); double RelFrequency = 0; for (Map.Entry&lt;String, Integer&gt; getValue: storeCharCount.entrySet()){ RelFrequency = (double)(getValue.getValue())/(a.length()); System.out.println("Character "+getValue.getKey() +" Relative Frequency: "+RelFrequency); } </code></pre> <p>Here is the output</p> <pre><code>Map: {f=1, g=1, =3, e=1, b=2, n=1, o=2, h=1, i=1, w=1, T=1, r=1, x=1} Character f Relative Frequency: 0.058823529411764705 Character g Relative Frequency: 0.058823529411764705 Character Relative Frequency: 0.17647058823529413 Character e Relative Frequency: 0.058823529411764705 Character b Relative Frequency: 0.11764705882352941 Character n Relative Frequency: 0.058823529411764705 Character o Relative Frequency: 0.11764705882352941 Character h Relative Frequency: 0.058823529411764705 Character i Relative Frequency: 0.058823529411764705 Character w Relative Frequency: 0.058823529411764705 Character T Relative Frequency: 0.058823529411764705 Character r Relative Frequency: 0.058823529411764705 Character x Relative Frequency: 0.058823529411764705 </code></pre>
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    1. COThe most straight forward solution would be a java.util.HashMap<Character, Integer>
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    2. COHow about you show us what you've done, then we can work from there? I'm sure we could all learn from it.
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    3. COI tried using the variation of using map.put(character, charCount=null?charCount=0:charCount+1) but this code can gives me the sum of each character and I have hard time getting the value part of this map "map(Key, Value)".
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