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Re: st: sum issue (wrong values)


From   Nick Cox <[email protected]>
To   [email protected]
Subject   Re: st: sum issue (wrong values)
Date   Wed, 24 Oct 2012 11:45:18 +0100

Sorry; belay that. You do have value labels.

Nick

On Wed, Oct 24, 2012 at 11:43 AM, Nick Cox <[email protected]> wrote:
> That does look puzzling. Three of us suggested that value labels might
> be getting in the way, but there are none.
> I don't have any further suggestions, beyond wondering whether your
> executable is corrupted. Can you get the same results from
>
> . list in 1/10
>
> immediately before or after the -summarize-?
>
> Nick
>
> On Wed, Oct 24, 2012 at 11:33 AM, Christian Bärtsch
> <[email protected]> wrote:
>> Thanks Nick - sorry I am only getting used to the correct terms.
>>
>> Yes it is correct, that I am looking at the -summarize- command in stata.
>>
>>
>> . sum latency_int
>>
>>     Variable |       Obs        Mean    Std. Dev.       Min        Max
>> -------------+--------------------------------------------------------
>>  latency_int |      5760    1102.242    700.1589          2       1999
>>
>> . describe latency_int
>>
>>               storage  display     value
>> variable name   type   format      label      variable label
>> -------------------------------------------------------------------------------
>> latency_int     int    %8.0g       latency_int
>>
>>
>> .
>> . count
>>  5760
>>
>> .
>> . summarize latency_int, detail
>>
>>                          latency_int
>> -------------------------------------------------------------
>>       Percentiles      Smallest
>>  1%           14              2
>>  5%           57              2
>> 10%        122.5              2       Obs                5760
>> 25%        377.5              2       Sum of Wgt.        5760
>>
>> 50%       1221.5                      Mean           1102.242
>>                         Largest       Std. Dev.      700.1589
>> 75%         1779           1998
>> 90%         1902           1998       Variance       490222.5
>> 95%         1948           1998       Skewness      -.2200922
>> 99%         1988           1999       Kurtosis       1.417508
>>
>> And here also an extract from list
>>
>> . list latency_int
>>
>>       +----------+
>>       | latenc~t |
>>       |----------|
>>    1. |     4720 |
>>    2. |     3923 |
>>    3. |     1844 |
>>    4. |     1435 |
>>    5. |     2955 |
>>       |----------|
>>    6. |     1483 |
>>    7. |     3459 |
>>    8. |     1004 |
>>    9. |     1716 |
>>   10. |     1372 |
>>       |----------|
>>
>> Thanks.
>>
>>
>> 2012/10/24 Nick Cox <[email protected]>:
>>> This is ambiguous as between the -summarize- command (which can be
>>> abbreviated -sum-) and the -sum()- function, which gives cumulative or
>>> running sums, although it seems you mean the first. In Stata (not
>>> "STATA") commands and functions are quite different families.
>>>
>>> Even then, you must show us exactly what you typed and exactly what
>>> Stata did by copying output. Otherwise it is difficult to guess what
>>> is going on. Does -latency_int- have value labels, which are what you
>>> see when you -list-, but not what are -summarize-d? You should show us
>>> the results of
>>>
>>> describe latency_int
>>> count
>>> summarize latency_int, detail
>>>
>>> Nick
>>>
>>> On Wed, Oct 24, 2012 at 11:13 AM, Christian Bärtsch
>>> <[email protected]> wrote:
>>>
>>>> I have a issue using the sum function of STATA. I have a data set,
>>>> where I have a variable called latency_int (type: int; and something
>>>> over 5700 values). I use the command sum(latency_int). There I get the
>>>> minimum of 2 and the maximum of 1999 even though the data set contains
>>>> values from 44 to 81000 (those values are shown when I use
>>>> list(latency_int). It must be a pretty basic mistake, however I have
>>>> not been able to come up with a solution for days.

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