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Re: st: matrix problem


From   Scott Merryman <scott.merryman@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: matrix problem
Date   Wed, 15 May 2013 10:18:24 -0500

If you create a new matrix equal to r(table) you to reference
individual elements:

sysuse auto,clear
somersd price mpg
mat a = r(table)
scalar c = a[1,1]+ 2
scalar list c

Scott


On Wed, May 15, 2013 at 10:13 AM, Maarten Buis <maartenlbuis@gmail.com> wrote:
> you can exctract a scalar from a table using the -el()- function, see
> -help el()-.
>
> -- Maarten
>
> On Wed, May 15, 2013 at 5:04 PM, Richard Goldstein
> <richgold@ix.netcom.com> wrote:
>> Hi all,
>>
>> I am using Newson's -somersd- command (from ssc); results, including the
>> piece I want, are saved in a matrix and I can list that matrix:
>>
>> . mat list r(table)
>>
>> r(table)[9,1]
>>             yhat1
>>      b  .62563699
>>     se  .00834334
>>      t  74.986391
>> pvalue  3.73e-257
>>     ll  .60924043
>>     ul  .64203354
>>     df        452
>>   crit  1.9652262
>>  eform          0
>>
>> My problem comes in attempting to use the [1,1] term (.62563699 here);
>> for example, I can't seem to list it:
>>
>> . matrix li r(table)[1,1]
>> [ invalid name
>> matrix [1,1] not found
>> r(111)
>>
>> and I can't do what I want to do - add this value to a scalar:
>>
>> scalar cstat=cstat+r(table)[1,1]
>> invalid syntax
>> r(198)
>>
>> note that cstat is not the problem as it is defined (as 0) prior to
>> entering my loop
>>
>> clearly I am doing something wrong but I have been unable to figure out
>> what it is or how to fix it
>>
>> Rich
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
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>
>
>
> --
> ---------------------------------
> Maarten L. Buis
> WZB
> Reichpietschufer 50
> 10785 Berlin
> Germany
>
> http://www.maartenbuis.nl
> ---------------------------------
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/
*
*   For searches and help try:
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