title: R language - difference hist result
body: <p>can anyone explain me the difference between these four statements in R language?</p>
  <pre><code>data
   [1] 18 22 18 20 20 20 20 17 17 16 20 17 21 19 18 19 13 21 19 14 22 19 20 20 16 19 21 19 17 20 15 20 18 19 26 21 19 22 20 24 25
   [42] 14 20 17 20 21 19 20 16 18 18 16 18 16 15 20 15 17 20 16 16 17 21 19 17 21 19 21 19 19 18 16 17 15 21 22 18 19 18 22 23 20
   [83] 21 17 17 15 12 23 18 19 18 21 18 17 18 22 16 20 21 18
  
  table(data)
   data
   12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 
   1  1  2  5  9 12 15 15 17 12  6  2  1  1  1 
  
  hist(data)
  hist(data, probability=TRUE)
  hist(table(data))
  hist(table(data), probability=TRUE)
  </code></pre>
  <p>The result is:
  <a href="https://i.stack.imgur.com/kwDiC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kwDiC.png" alt="enter image description here" /></a></p>
  <p>Thank you!</p>