Databases
StackOverflow2013
Postsdbo
POHow to do statistical classification on an array in javascript?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to do statistical classification on an array in javascript?
    primarykey
    data
    text
    <p>I've got a bunch of numbers in an array and I need to do some statistics on them. I need to know how many of each number there are in the array. </p> <p>Here's the array: </p> <pre><code>myArray = [2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 27, 27, 28, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31, 32, 32, 32, 32, 32, 32, 32, 33, 33, 33, 33, 33, 33, 34, 34, 35, 35, 35, 35, 35, 35, 36, 36, 36, 36, 36, 36, 37, 37, 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 40, 40, 40, 41, 41, 42, 42, 42, 42, 42, 42, 43, 43, 43, 44, 44, 44, 44, 44, 45, 45, 46, 46, 46, 46, 46, 46, 46, 47, 47, 47, 47, 47, 47, 48, 48, 48, 49, 49, 49, 49, 49, 49, 49, 49, 49, 50, 50, 50, 50, 50, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 52, 52, 53, 53, 53, 53, 53, 53, 53, 54, 54, 54, 55, 55, 55, 55, 55, 56, 57, 57, 57, 57, 57, 57, 57, 58, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 61, 61, 62, 62, 63, 63, 63, 64, 64, 64, 64, 64, 65, 65, 66, 66, 66, 67, 67, 67, 68, 68, 68, 69, 69, 69, 69, 69, 69, 70, 70, 71, 71, 71, 71, 71, 71, 71, 72, 73, 73, 73, 73, 74, 74, 74, 75, 75, 75, 76, 77, 78, 78, 79, 79, 80, 80, 81, 81, 81, 81, 81, 82, 82, 82, 82, 83, 83, 83, 83, 84, 84, 84, 85, 85, 85, 85, 85, 86, 86, 86, 86, 86, 86, 87, 87, 87, 88, 88, 89, 89, 90, 90, 91, 91, 91, 92, 93, 94, 95, 95, 95, 95, 95, 96, 96, 96, 96, 97, 97, 99, 99, 99, 99, 99, 101, 101, 102, 102, 103, 103, 105, 105, 105, 106, 107, 107, 108, 108, 109, 109, 109, 109, 110, 112, 112, 113, 113, 113, 114, 114, 115, 116, 116, 117, 118, 120, 121, 121, 121, 122, 122, 123, 123, 123, 124, 124, 124, 124, 125, 126, 127, 128, 129, 130, 130, 131, 131, 131, 131, 132, 133, 133, 134, 134, 134, 136, 136, 136, 136, 137, 137, 137, 138, 138, 138, 139, 139, 139, 140, 141, 141, 142, 142, 143, 144, 144, 144, 144, 145, 150, 150, 153, 155, 159, 160, 160, 161, 162, 164, 164, 166, 176, 180, 180, 180, 181, 181, 187, 191, 192, 193, 194, 197, 200, 203, 211, 216, 224, 251, 280, 333] </code></pre> <p>Here's what I'm using to parse through it currently (which is not working very well): </p> <pre><code> for (var key in myArray){ var obj = myArray[key]; var count = 0; while(obj &lt; 30){ myArrayStats[0] = count; obj++; } while(obj &gt; 30 &amp;&amp; obj &lt; 40){ myArrayStats[1] = count; obj++; } //etc.... } </code></pre> <p>Creating a new array using object literals would be much nicer and easier to use, but I'm not sure how to do it. </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USmichael
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COI guess you wanted something more like if (obj < 30) { myArrayStats[0] = (myArrayStats[0] || 0) + 1; } else if (obj >= 30 && obj < 40) { myArrayStats[1] = (myArrayStats[1] || 0) + 1; } etc?? Anyway, hope the answers below clear it up.
      singulars
      1. POHow to do statistical classification on an array in javascript?
      1. USDavid F
    2. COIn R, one would simply do `table(cut(myArray, c(0, 30, 40, Inf)))` and the result is (will probably get broken: `(0,30] (30,40] (40,Inf] 113 56 326`˛ :) You could add -Inf to have values smaller than zero on the left side.
      singulars
      1. POHow to do statistical classification on an array in javascript?
      1. USRoman Luštrik
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload