OBS= tells SAS when to stop processing observations. To determine when to stop processing, SAS uses the value for OBS= in a formula that includes the value for OBS= and the value for FIRSTOBS=. The formula is (obs - firstobs) + 1 = results

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. We'll start by using the OBS= option to create the data set that we'll be working with throughout this lesson.

The OBS= data set option enables you to select observations from SAS data sets. You can select observations to be read from external data files by using the OBS= option in the INFILE statement. Examples

2018年7月3日 · Reading the descriptor portion is one of the most efficient and quickest ways of determining the number of observations in a SAS data set. Here are some examples: /* SAS V9.x and higher */ data _NULL_; if 0 then set sashelp.class nobs=n; call symputx('nrows',n); stop; run; %put nobs=&nrows;

The OBS= data set option enables you to select observations from SAS data sets. You can select observations to be read from external data files by using the OBS= option in the INFILE statement.

2013年12月18日 · [SAS] 使用OBS=指令取出部分数据. 今日主题是SAS的「OBS=」以及「FIRSTOBS=」这两个指令。 适用于什么场合呢？ 可以用在当研究者想要浏览数据中的一部分时。 什么意思呢？ 请看今天的范例数据(如下)。 现在有一个数据，内有10个观察值，分别有ID、 Rainfall、Wind、Temperature等四个变量。 而这个数据我已经倒入到SAS环境，名称为Bean。 http://s6/mw690/001m7RqPty6F5wlJfKZ45&690 使用OBS=指令取出部分数据" TITLE=" [SAS] …

OBS= tells SAS when to stop processing observations or records. To determine when to stop processing, SAS uses the value for OBS= in a formula that includes the value for OBS= and the value for FIRSTOBS=.

2018年3月14日 · OBS can be a system option or a dataset option, it limits the number of observarions read in a proc or a datastep. OBS normally decides the number of the last observation read. If, however, you have tables with "holes" in them (deleted observations), the results can vary a bit. Look at this:

OBS= tells SAS when to stop processing observations or records. To determine when to stop processing, SAS uses the value for OBS= in a formula that includes the value for OBS= and the value for FIRSTOBS=. The formula is (obs - firstobs) + 1 = results

2024年3月25日 · Use the SAS data set options FIRSTOBS= or OBS= (or both) to limit the number of rows that SAS reads from a table. Limiting the rows of a large table can be helpful while you are developing a query. You need to enable JavaScript to run this app.