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RE: st: RE: [9.2] mkmat rownames


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: [9.2] mkmat rownames
Date   Mon, 11 Feb 2008 11:43:16 -0000

That being so, it seems you need to accumulate row names by hand, as you
guessed. 

forval i = 1/15 { 
	local names `names' `=tapm[`i']' 
}
matrix rownames R = `names' 

Keith Dear

Thanks Nick, but that option must be new in Stata 10.
Stata 9 has a -matname- command and also -matrix rownames-,
but both need an explicit <namelist>, not a variable name.
Ah well, one more reason to upgrade.
Keith

At 04:40 AM 11/02/2008, you wrote:
>On the face of it, you should use the -rownames()- option to read in
>your desired  row names. -mkmat- expects numeric variables to define
the
>(numeric) content of the matrix. At least that is the case in Stata 10.
>At this moment I don't have access to Stata 9 or a manual for 9.
>
>Nick
>n.j.cox@durham.ac.uk
>
>Keith Dear
>
>I have a dataset that contains, in part:
>. list tapm min max in 1/15
>
>       +-----------------------------+
>       |  tapm        min        max |
>       |-----------------------------|
>    1. |  tavg   9.281472   33.19886 |
>    2. |  tmax   14.53456   41.24549 |
>    3. |  tmin   .6966457   27.99766 |
>    4. |  havg   1.905087   19.26358 |
>    5. |  hmax   2.254643   23.64934 |
>       |-----------------------------|
>    6. |  ravg   18.82322   95.66055 |
>    7. |  rmax   29.75645        100 |
>    8. |    ws   .8907141   11.97882 |
>    9. |  oavg   1.705984     52.421 |
>   10. |  omax   5.090116    133.497 |
>       |-----------------------------|
>   11. |  navg   .0532477   25.27975 |
>   12. |  nmax   .1555686   81.82613 |
>   13. |  pavg   1.754097   39.62774 |
>   14. |  pmax   2.989739   136.7765 |
>   15. | o4max   3.433426   115.7704 |
>       +-----------------------------+
>
>I want to save the (min, max) values in a 15x2 matrix with rownames
>from variable tapm.
>
>This doesn't work:
>. mkmat tapm min max in 1/15, mat(R)
>varlist:  tapm:  string variable not allowed
>r(109);
>
>I can get the numbers in ok:
>. mkmat min max in 1/15, mat(R)
>. mat list R
>
>R[15,2]
>             min        max
>   r1  9.2814722   33.19886
>   r2  14.534559  41.245491
>   r3  .69664574  27.997656
>   r4  1.9050874   19.26358
>   r5  2.2546427  23.649343
>   r6  18.823215  95.660553
>   r7  29.756449        100
>   r8  .89071411  11.978825
>   r9  1.7059844  52.421001
>r10   5.090116  133.49698
>r11  .05324766  25.279753
>r12   .1555686  81.826134
>r13  1.7540972  39.627739
>r14  2.9897394  136.77647
>r15  3.4334259  115.77041
>
>But how do I get the names in? Not like this, for example:
>. mat rownames R = tapm
>. mat list R
>
>R[15,2]
>              min        max
>tapm  9.2814722   33.19886
>tapm  14.534559  41.245491
>tapm  .69664574  27.997656
>tapm  1.9050874   19.26358
>tapm  2.2546427  23.649343
>tapm  18.823215  95.660553
>tapm  29.756449        100
>tapm  .89071411  11.978825
>tapm  1.7059844  52.421001
>tapm   5.090116  133.49698
>tapm  .05324766  25.279753
>tapm   .1555686  81.826134
>tapm  1.7540972  39.627739
>tapm  2.9897394  136.77647
>tapm  3.4334259  115.77041
>
>I suppose I could do it with a loop that builds a macro containing
>the 15 words, but am I overlooking a better way?

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