Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: RE: RE: How do I drop first and last observations please?
From
Lucie Vlach <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: RE: How do I drop first and last observations please?
Date
Mon, 18 Jul 2011 13:56:10 -0600
Yes! Thank you Sarah! drop if inlist(_n,1,_N) deleted the first and last, but drop if inlist(_n,1,_N-1) deleted the first and second last.
Thank you both! This REALLY helped! (Now I know how to deleted the second last as well, if needed, good lesson for other deletions)
Lucie
________________________________________
From: [email protected] [[email protected]] On Behalf Of Sarah Edgington [[email protected]]
Sent: July 18, 2011 1:50 PM
To: [email protected]
Subject: st: RE: How do I drop fist and last observations please?
.
That would need to be drop if inlist(_n,1,_N)
_N-1 is the penultimate observation not the last one.
-Sarah
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Lance Erickson
Sent: Monday, July 18, 2011 11:59 AM
To: [email protected]
Subject: st: How do I drop fist and last observations please?
I believe the following should work...
drop if inlist(_n,1,_N-1)
Lance
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Lucie Vlach
Sent: Monday, July 18, 2011 12:38 PM
To: [email protected]
Subject: st: How do I drop fist and last observations please?
Hello everyone!
I need to drop my first and last observation from a data set in a do file.
Not all datasets will have the same number of observations. Is there a good
'drop' command that will do this for me, regardless how long my dataset is?
It will always be the first and last observation.
Here is the example of my data:
Record_Type Sub_Prefix Current_Yr Source Sequence_Number Check_Digit
Transaction_Type Segment_Type Segment_Sequence Action_Code Unused Claim_Type
Service_Provider_ULI Skill_Code Service_Recipient_ULI
2 UCM 00 00 80
3 UCM 11 00 00546733 4 CIP1 CIB1 0001C RGLR 3535446208 PSYC 352543330
3 UCM 11 00 0037920 6 CIP1 CIB1 0001A RGLR 2296454208 GP 445454551
4 UCM 00 00 8000143 0 0000 144
Here I want to drop: "2 UCM 00 00 80" and "4 UCM 00 00 8000143 0 0000 144"
Thank you all very much for any help!
Lucie
This message and any attached documents are only for the use of the intended
recipient(s), are confidential and may contain privileged information. Any
unauthorized review, use, retransmission, or other disclosure is strictly
prohibited. If you have received this message in error, please notify the
sender immediately, and then delete the original message. Thank you.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
This message and any attached documents are only for the use of the intended recipient(s), are confidential and may contain privileged information. Any unauthorized review, use, retransmission, or other disclosure is strictly prohibited. If you have received this message in error, please notify the sender immediately, and then delete the original message. Thank you.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/