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st: Dummy variable transformation replacing missing data
From
Joe Dreyfus <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Dummy variable transformation replacing missing data
Date
Mon, 11 Jun 2012 14:54:30 +0200
Hi Statalist,I have the following data.
id
t
x
z
y
1
1
1
.
.
.
2
1
2
1
0
0
3
1
3
.
.
.
4
2
1
0
1
0
5
2
2
.
.
.
6
2
3
.
.
.
7
2
4
.
.
.
8
2
5
.
.
.
9
3
1
.
.
.
10
3
2
0
0
1
11
3
3
.
.
.
12
3
4
.
.
.
13
3
5
.
.
.
14
3
6
.
.
.
And would like to transform the data as follows:
id
t
x
z
y
x'
z'
y'
1
1
1
.
.
.
1
0
0
2
1
2
1
0
0
1
0
0
3
1
3
.
.
.
1
0
0
4
2
1
0
1
0
0
1
0
5
2
2
.
.
.
0
1
0
6
2
3
.
.
.
0
1
0
7
2
4
.
.
.
0
1
0
8
2
5
.
.
.
0
1
0
9
3
1
.
.
.
1
0
1
10
3
2
0
0
1
1
0
1
11
3
3
.
.
.
1
0
1
12
3
4
.
.
.
1
0
1
13
3
5
.
.
.
1
0
1
14
3
6
.
.
.
1
0
1
The time period where the indicator is on is not relevant. I just need to know how to transform the variable so that if it is swtiched on in one time period it is transformed to be switched on for all time periods. Thanks in advance!Joe