How do I use OBS and Firstobs in SAS?
14.1 – The FIRSTOBS= and OBS= options
- The SET statement’s FIRSTOBS= option tells SAS to begin reading the data from the input SAS data set at the line number specified by FIRSTOBS.
- The SET statement’s OBS= option tells SAS to stop reading the data from the input SAS data set at the line number specified by OBS.
What is options OBS in SAS?
The OBS= system option specifies which observation from a data set or which record from a raw data file that SAS reads last. You can also use OBS= to control analysis of SAS data sets in PROC steps. If SAS is processing a file of raw data, OBS= specifies the last line of data to read.
How do I limit OBS in SAS?
You can use the OBS= and FIRSTOBS= data set options to limit the number of observations that SAS processes. The OBS= data set option specifies the number of the last observation to process. It does not specify how many observations should be processed.
What does Firstobs mean in SAS?
Data Set Option
Specifies the first observation that SAS processes in a SAS data set. Valid in: DATA step and PROC steps.
How do you use last in SAS?
LAST. variable = 1 when an observation is the last observation in each group values of variable ID. LAST. variable = 0 when an observation is not the last observation in each group values of variable ID.
How do you use Outobs in SAS?
The OUTOBS= option restricts the number of rows that PROC SQL displays or writes to a table. For example, if you specify OUTOBS=10 and insert values into a table by using a query, then PROC SQL inserts a maximum of 10 rows into the resulting table. OUTOBS= is similar to the SAS data set option OBS=.
What is the difference between retain and keep in SAS?
The RETAIN statement causes SAS to hold the value of a variable from one iteration of the DATA step to the next iteration. The KEEP statement does not affect the value of variables but only specifies which variables to include in any output data sets.
Is data a SAS statement?
The DATA step consists of a group of SAS statements that begins with a DATA statement. The DATA statement begins the process of building a SAS data set and names the data set. The statements that make up the DATA step are compiled, and the syntax is checked. If the syntax is correct, then the statements are executed.
What is data step in SAS?
A DATA step is a group of SAS language statements that begin with a DATA statement. The DATA statement is followed by other programming statements that manipulate existing SAS data sets or create SAS data sets from raw data files.
What is OBS in SAS?
The OBS= system option specifies which observation from a data set or which record from a raw data file that SAS reads last. You can also use OBS= to control analysis of SAS data sets in PROC steps. If SAS is processing a file of raw data, OBS= specifies the last line of data to read.
How do I merge data in SAS?
Merge two data sets in SAS. To merge two or more data sets in SAS, you must first sort both data sets by a shared variable upon which the merging will be based, and then use the MERGE statement in your DATA statement. If you merge data sets without sorting, called one-to-one merging, the data of the merged file will overwrite…
When do you use SAS?
Use a SAS when you want to provide secure access to resources in your storage account to any client who does not otherwise have permissions to those resources. A common scenario where a SAS is useful is a service where users read and write their own data to your storage account.