Re: st: data manipulation question

["Austin Nichols" <austinnichols@gmail.com>]

David Airey <david.airey@vanderbilt.edu>:
-levelsof- -foreach- and -local- are very useful commands--I recommend
getting to know them well (read the help files).

levelsof iso_str, local(vs)
foreach v of local vs {
g byte iso_`v'=(iso_str=="`v') if !mi(iso_str)
}

On 6/26/07, David Airey <david.airey@vanderbilt.edu> wrote:
> I have a variable naming question, after encoding.
>
> I used these commands,
>
> encode iso_str, generate(iso)
> tab iso, gen(iso_)
>
> "iso_str" was a variable with these levels:
>
> . levels iso_str
> `"IDI"' `"IDV"' `"IGI"' `"IGV"' `"INI"' `"INV"' `"ISI"' `"ISV"'
> `"MDV"' `"MNI"'
>  > `"MNV"' `"MSI"' `"MSV"' `"VDI"' `"VDV"' `"VGI"' `"VGV"' `"VNI"'
> `"VNV"' `"VSI"
>  > ' `"VSV"'
>
> and so iso has these levels
>
> . levels iso
> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
>
> after tab iso, gen(iso_)
>
> I wind up with 1,0 indicator variables for each level of iso, with
> useful variable labels. But really I'd like to have indicator
> variables named for each level, like "IDI" instead of "iso_1". How do
> I do that?
>
>
>               storage  display     value
> variable name   type   format      label      variable label
> ------------------------------------------------------------------------
> -------
> iso_str         str3   %9s
> iso             long   %8.0g       iso
> iso_1           byte   %8.0g                  iso==IDI
> iso_2           byte   %8.0g                  iso==IDV
> iso_3           byte   %8.0g                  iso==IGI
> iso_4           byte   %8.0g                  iso==IGV
> iso_5           byte   %8.0g                  iso==INI
> iso_6           byte   %8.0g                  iso==INV
> iso_7           byte   %8.0g                  iso==ISI
> iso_8           byte   %8.0g                  iso==ISV
> iso_9           byte   %8.0g                  iso==MDV
> iso_10          byte   %8.0g                  iso==MNI
> iso_11          byte   %8.0g                  iso==MNV
> iso_12          byte   %8.0g                  iso==MSI
> iso_13          byte   %8.0g                  iso==MSV
> iso_14          byte   %8.0g                  iso==VDI
> iso_15          byte   %8.0g                  iso==VDV
> iso_16          byte   %8.0g                  iso==VGI
> iso_17          byte   %8.0g                  iso==VGV
> iso_18          byte   %8.0g                  iso==VNI
> iso_19          byte   %8.0g                  iso==VNV
> iso_20          byte   %8.0g                  iso==VSI
> iso_21          byte   %8.0g                  iso==VSV
>
>
>
> --
> David C. Airey, Ph.D.
> Research Assistant Professor
>
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