Thanks for your support in advance
Below is the input
INPUT | ||
sno | txt | sq |
1 | a | 1 |
1 | b | 2 |
1 | u | 3 |
1 | u | 4 |
1 | u | 5 |
1 | c | 6 |
2 | a | 1 |
2 | b | 2 |
3 | a | 1 |
3 | b | 2 |
3 | u | 3 |
3 | c | 4 |
3 | u | 5 |
3 | u | 6 |
Need output as shown below variable txt with 'u' observation with previous value.& current value i.e 'u' as shown in BOLD.
OUTPUT | ||
sno | txt | sq |
1 | a | 1 |
1 | b | 2 |
1 | bu | 3 |
1 | bu | 4 |
1 | bu | 5 |
1 | c | 6 |
2 | a | 1 |
2 | b | 2 |
3 | a | 1 |
3 | b | 2 |
3 | bu | 3 |
3 | c | 4 |
3 | cu | 5 |
3 | cu | 6 |
data have;
input sno txt : $8. sq;
datalines;
1 a 1
1 b 2
1 u 3
1 u 4
1 u 5
1 c 6
2 a 1
2 b 2
3 a 1
3 b 2
3 u 3
3 c 4
3 u 5
3 u 6
;
data want;
set have;
by sno;
length k $8;
if first.sno then call missing(k);
retain k;
if txt='u' then txt=cats(k,txt);
else k=txt;
drop k;
run;
Thank you
now i have couple of more records with below instance sno 4,5
INPUT
sno txt sq
1 a 1
1 b 2
1 u 3
1 u 4
1 u 5
1 c 6
2 a 1
2 b 2
3 a 1
3 b 2
3 u 3
3 c 4
3 u 5
3 u 6
4 u 1
4 b 2
5 a 1
5 u 2
5 b 3
Need output as shown below variable txt with 'u' observation for sno 4 and 5 as well
OUTPUT
sno txt sq
1 a 1
1 b 2
1 bu 3
1 bu 4
1 bu 5
1 c 6
2 a 1
2 b 2
3 a 1
3 b 2
3 bu 3
3 c 4
3 cu 5
3 cu 6
4 bu 1
4 b 2
5 a 1
5 bu 2
5 b 3
@help09 The solution is straight forward and simple with retain, concatenate and reset logic
If the question is answered, you could mark and close the thread
If the length of your current TXT field is 1 (proc contents or other method methods examining the table to tell) then your solution will require setting a length for the variable to hold the longest expected value.
This would look something like:
data want; length txt $ 2; set have; /* other code*/ run;
Note that if the length statement is after the Set you'll get a warning that you can't change existing variable length.
Thank you
now i have couple of more records with below instance sno 4,5
INPUT
sno txt sq
1 a 1
1 b 2
1 u 3
1 u 4
1 u 5
1 c 6
2 a 1
2 b 2
3 a 1
3 b 2
3 u 3
3 c 4
3 u 5
3 u 6
4 u 1
4 b 2
5 a 1
5 u 2
5 b 3
Need output as shown below variable txt with 'u' observation for sno 4 and 5 as well
OUTPUT
sno txt sq
1 a 1
1 b 2
1 bu 3
1 bu 4
1 bu 5
1 c 6
2 a 1
2 b 2
3 a 1
3 b 2
3 bu 3
3 c 4
3 cu 5
3 cu 6
4 bu 1
4 b 2
5 a 1
5 bu 2
5 b 3
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