On 9/19/02 15:26, Richard Herrell wrote
>I've just started learning Stata syntax after long years of SAS use and am
>completely stumped by a result. I want to create a new 4-level variable
>(ascertgp) based on the crosstabulation of 2 dichotomous variables (probip
>and promig). This is the syntax I wrote:
>
>if probip==1 & promig==1 {
> gen ascertgp=1
>}
>else if probip==0 & promig==1 {
> gen ascertgp=2
>}
>else if probip==1 & promig==0 {
> gen ascertgp=3
>}
>else if probip==0 & promig==0 {
> gen ascertgp=4
>}
>
This construction would work better as
if xxx {
blah blah
}
else {
if yyy {
yada yada
}
}
A better way around this would be to try
gen ascertgp = 4 - promig*2 - probip
There is a built-in Stata command for creating the categories, but it
escapes me at the moment.
Bill
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