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Re: st: factor variables may not contain negative values


From   malay biswas <[email protected]>
To   [email protected]
Subject   Re: st: factor variables may not contain negative values
Date   Mon, 19 Aug 2013 09:01:59 +0530

Dear Prof William, Prof Buis, Prof. Buchanan
Thank you for your clarification. I am able to execute the tasks.
Thank you for your valuable time.
With Regards
Malay


On Fri, Aug 16, 2013 at 8:10 PM, Richard Williams
<[email protected]> wrote:
> Just to add to what others have said, if you type
>
> help fvvarlist
>
> it says "Categorical variables to which factor-variable operators are
> applied must contain nonnegative integers with values in the range 0 to
> 32,740, inclusive."
>
> Allowing negative numbers or non-integer values would screw up syntax like
> i2.cat or 2.cat, e.g. i-9.cat or i-3.278.cat would be weird syntax.
>
>
> At 05:52 AM 8/16/2013, malay biswas wrote:
>>
>> Dear All,
>> Could please tell meas to how stata operates in the following situation.
>>
>> I have data set containing codes for missing data and other contingencies.
>>
>> Yes= 1
>> No = 2
>> Do Not Know = -9 (Minus)
>> Still in Progress= -6(Minus)
>>
>> When conducting interaction with other variables having similar coding
>> arrangements, I get stata notification that "factor variables may not
>> contain negative values."
>>
>> Could you please tell me what is happening?
>>
>> Thank you for your continued support.
>> Regards
>> Malay
>> *
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>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
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> WWW:    http://www.nd.edu/~rwilliam
>
>
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*
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