keep according serial number

[Raeedur Rahman]

dear all I have a data set which has a variable name "Serial number" like (1 to 1000).



SL i want to keep from SL
1 5
2 9
3 12
4 8
5 9
6 3
7
8
9
10
11
12
13


i want to keep this SL number and droop the others
Thanks

[Maarten Buis]

Typing keep SL will keep the variable SL and drop all other variables.

[William Lisowski]

If Martin's answer is not what you want - if you desire to keep certain observations and remove the others from your data - we will need to understand your data better. What does the observation "1 5" mean, for example, since you suggest the serial number runs from 1 to 1000.

As you have been advised before by others on Statalist, please review the Statalist FAQ linked to from the top of the page, as well as from the Advice on Posting link on the page you used to create your post, looking especially at sections 9-12 on how to best pose your question. In section 12.2 you will see

We can understand your dataset only to the extent that you explain it clearly.

It would be particularly helpful to post a small hand-made example, perhaps with just a few variables and observations, showing the data before the process and indicating which ones you expect to keep..

[Raeedur Rahman]

i have found the solution
the command will be like this
keep if (Sl==594 | Sl==158 | Sl==273| Sl==63| Sl==88| Sl==575| Sl==275| Sl==521| Sl==252| Sl==159| Sl==165| Sl==268| Sl==177| | Sl==190| Sl==416| Sl==64| Sl==573 | Sl==139 | Sl==281 | Sl==462 | Sl==26 | Sl==61 | Sl==8 | Sl==594 | Sl==25)
thanks to all

[Carole J. Wilson]

See help inlist for a much less error prone approach:

keep if inlist(SI, 594, 158, 273, 63, 88, 575, 275, 521, 252, 159, 165, 268, 177, 190, 416, 64, 573, 139, 281, 462, 26, 61, 8, 594, 25)

[Raeedur Rahman]

Thanks