Databases
StackOverflow2013
Postsdbo
POR time series period subtract?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POR time series period subtract?
    primarykey
    data
    text
    <p>There are sample data of a user's event after 3 week ago :</p> <pre><code>&gt; subret uid event_name date count 2 10225 _e_io 2013-07-23 2 3 10225 _e_io 2013-07-24 3 4 10225 _e_io 2013-07-25 7 5 10225 _e_io 2013-07-26 6 6 10225 _e_io 2013-07-27 11 7 10225 _e_io 2013-07-28 4 8 10225 _e_io 2013-07-29 4 9 10225 _e_io 2013-07-30 2 10 10225 _e_io 2013-07-31 3 11 10225 _e_io 2013-08-01 1 12 10225 _e_io 2013-08-02 5 13 10225 _e_io 2013-08-03 2 14 10225 _e_io 2013-08-04 9 15 10225 _e_io 2013-08-05 13 16 10225 _e_io 2013-08-06 4 17 10225 _e_io 2013-08-07 14 18 10225 _e_io 2013-08-08 15 19 10225 _e_io 2013-08-09 11 20 10225 _e_io 2013-08-10 7 21 10225 _e_io 2013-08-11 2 22 10225 _e_renderer-load 2013-08-06 3 23 10225 _e_unknown 2013-07-29 1 24 10225 _e_unknown 2013-07-31 1 25 10225 _e_unknown 2013-08-01 1 26 10225 _e_unknown 2013-08-02 1 27 10225 _e_unknown 2013-08-06 4 28 10225 _e_unknown 2013-08-08 7 29 10225 _e_unknown 2013-08-10 3 </code></pre> <p>I don't know how to get the value of the weekly subtract of a event. It's hard to operation for one by one event supply the lost date count. Does R support subtract the value as a consistent key match (like <code>merge</code>) ?</p> <p>It's means :</p> <pre><code>&gt; ta &lt;- (subret[subret$event_name == "_e_io" &amp; subret$date &lt;= as.Date("2013-07-29"), ]) &gt; tb &lt;- (subret[subret$event_name == "_e_io" &amp; subret$date &gt; as.Date("2013-07-29") &amp; subret$date &lt;= as.Date("2013-08-05"), ]) &gt; (ta$count - tb$count / ta$count) [1] 1.000000 2.000000 6.857143 5.166667 10.818182 1.750000 0.750000 </code></pre> <p>I could get the increase speed every day of a week.</p> <h2>Updated</h2> <p>Sorry for the operation priority. Speed of weekly change should be:</p> <pre><code>&gt; ((ta$count - tb$count) / ta$count) [1] 0.0000000 0.0000000 0.8571429 0.1666667 0.8181818 -1.2500000 -2.2500000 </code></pre> <p>It's ok for <code>_e_io</code> that dates of a week are fully, but for others that dates of a week are not fully. Is that true I need pad the date alignment first? (use <code>merge</code> ?)</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDreampuf
    1. USDreampuf
    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
    1. This table or related slice is empty.
    1. COCan you clarify your question by providing the expected output at least.
      singulars
      1. POR time series period subtract?
      1. USagstudy
 

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