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Re: st:how to match created matrix to the original data set


From   Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st:how to match created matrix to the original data set
Date   Tue, 18 Aug 2009 21:18:27 +0100

<>
I typically do not use anything other than the help files

help matrix functions

and an old Stata 8 Programming Reference Manual which has a very good
section on working with Stata matrices.

T

On Tue, Aug 18, 2009 at 9:01 PM, Mandy fu<mandy.fu1@gmail.com> wrote:
> Hi Tirthankar Chakravarty ,
>
> Thanks for your response! The way you suggested works well.
>
> By the way, may I know if you have any suggestion where I can find
> more discussion/instruction on matrix operations? Before I sent out my
> question, I have searched the manual and the online post. But did not
> find the answer(For example, I found "rowsof()"; but I have not yet
> seen using it after J). I think I must have missed some resource on
> matrix commands in Stata.
>
> Thanks again,
> Mandy
>
> On 8/18/09, Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com> wrote:
>> <>
>>
>> The last part can be done this way:
>> ********************************
>> mat define A=(2,2,2,2,2,2,2,2,2 \/*
>>                */2,2,2,2,2,2,2,2,2 \/*
>>                */2,2,2,2,2,2,2,2,2)
>> mat list A
>> mat A = (A, J(rowsof(A), 1, 1))
>> mat list A
>> ********************************
>>
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recursive class signs r, such that neither v Gen r nor Neg(v Gen r)
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