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Re: st: Use of matrix values in generate statements
From
[email protected] (William Gould, StataCorp LP)
To
[email protected]
Subject
Re: st: Use of matrix values in generate statements
Date
Mon, 28 Mar 2011 09:16:48 -0500
Daniel Feenberg <[email protected]> writes,
> I am at the point of calculating the standard deduction for each taxpayer.
> There are 6 possible filing status's and 24 years of tax law, so there are
> 144 possible values for the deduction. [...
>
> the value for each taxpayer. As I understand it, Stata matricies can't be
> used in -generate- statements, though, so I can't do something like:
>
> matrix input stdvalues (3700 6200...\3800 6350...\...
> generate stded = stdvalues[year-1992,filestat]
Yes you can index into matrices in exactly the way Daniel showed,
although Daniel shows incorrect syntax for -matrix input-.
In the example below, I assume there are 2 possible filing status's
and 3 years of tax law:
. list
+-------------------------+
| id year filestat |
|-------------------------|
1. | 10873 1993 1 |
2. | 19223 1994 2 |
3. | 21003 1995 1 |
+-------------------------+
Note that in what follows, I code -generate stded- just as Daniel suggests,
. matrix input stdvalues = (3700, 6200 \ 3800, 6350 \ 3900, 7000)
. generate stded = stdvalues[year-1992, filestat]
. list
+---------------------------------+
| id year filestat stded |
|---------------------------------|
1. | 10873 1993 1 3700 |
2. | 19223 1994 2 6350 |
3. | 21003 1995 1 3900 |
+---------------------------------+
-- Bill
[email protected]
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