Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: loop
From
Chiara Mussida <[email protected]>
To
[email protected]
Subject
Re: st: loop
Date
Mon, 27 Aug 2012 11:41:37 +0200
for log the answer is log10
On 27/08/2012, Chiara Mussida <[email protected]> wrote:
> the suggestion of Nick works in the correct direction, and for sure I
> do not need dummies for my cat.
> Only two issues: i would need a weighted values of my cat before
> computing the log. Second and related to this latter: is there a way
> to compute log and not ln. I tried to write log instead of ln, but
> Stata returns ln.
> Thanks
>
>
> On 27/08/2012, Nick Cox <[email protected]> wrote:
>> It's not possible to comment on Chiara's code or what went wrong
>> because contrary to much repeated advice there are no precise details
>> of what she tried.
>>
>> But given say -newcat121-newcat1212- the log of the frequencies of 1s
>> are given by
>>
>> forval j = 1/12 {
>> su newcat12'j', meanonly
>> .... = ln(r(sum))
>> }
>>
>> where ... is the assignment to scalar or variable Chiara wants.
>>
>> But the dummies (indicators) are not necessary for this purpose at
>> all. A -tabulate- of the original variable shows the frequencies in
>> question.
>>
>> (For ' read left single quote above when appropriate.)
>>
>> Nick
>>
>> On 27 Aug 2012, at 08:22, Muhammad Anees <[email protected]> wrote:
>>
>>> tab cat12, gen(newcat12)
>>>
>>> will give you those required variables (categorical or dummies).
>>>
>>> HTH
>>> Anees
>>>
>>> On Mon, Aug 27, 2012 at 11:32 AM, Chiara Mussida
>>> <[email protected]> wrote:
>>>> Dear all,
>>>> the variable cat12 takes the values from 1 to 12. I want to create 12
>>>> different scalars or variables for each cat. The problem is that each
>>>> scalar must take the values correspondent to the log of the number of
>>>> obs in each cat (weighted) since i have to write an index which needs
>>>> those numbers. I tried with forvalues but i did not succeed!
>>>> Ps: cat12 is a variable for occupational categories (from 1 to 12).
>>>> In
>>>> the index i put the weighted values (weight available in my dataset).
>>>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/statalist/faq
>> * http://www.ats.ucla.edu/stat/stata/
>>
>
>
> --
> Chiara Mussida
> PhD candidate
> Doctoral school of Economic Policy
> Catholic University, Piacenza (Italy)
>
--
Chiara Mussida
PhD candidate
Doctoral school of Economic Policy
Catholic University, Piacenza (Italy)
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/