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proctice
Quartz | Level 8

I want a movsum 4 but I don't want that first couple of observations that are computed with 1, 2, 3 observations.  I only want observations that are computed with 4 observations.  I have several by groups so it is not that easy to just delete them. Is there a way to tell proc expand not to include them or an easy way to delete when you have many by groups. Thanks.

1 ACCEPTED SOLUTION

Accepted Solutions
dw_sas
SAS Employee

Hi,

 

You can add the TRIMLEFT 3 operand after the MOVSUM 4 specification in your CONVERT statement to set the first 3 moving sum values within each BY group to missing.  For example:

 

convert x=movsum_x / transform=(movsum 4 trimleft 3);

 

I hope this helps!

DW

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1 REPLY 1
dw_sas
SAS Employee

Hi,

 

You can add the TRIMLEFT 3 operand after the MOVSUM 4 specification in your CONVERT statement to set the first 3 moving sum values within each BY group to missing.  For example:

 

convert x=movsum_x / transform=(movsum 4 trimleft 3);

 

I hope this helps!

DW

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