Nndo loop in sas example pdf documents

In this example, the do loop is executed when i1 and i2. The do until statement executes statements in a do loop. Using the iterative do statement without infinite looping. Lets say you have a series of sas data sets class1 class10. Writing cleaner and more powerful sas code using macros myweb. As far as i can see, you dont really have an index that macro loop can use, so we will have to go from scratch. The sas iml language is a matrixvector language, so statements that operate on a few long vectors run much faster than equivalent statements that involve many scalar quantities. To get all the old files names that need to be renamed. Import all csv files that exist within a directory tree level 3. Create a set of new variables from an existing set of variables, e. How can i generate pdf and html files for my sas output.

The data step is actually an implied do loop whose statements will be executed for each observation. The iterative do statement executes a group of statements repetitively based on the value of an index variable. It can also be used to dynamically build a series of data steps or proc steps. Using do statements, links, and arrays sas support. In each of the following examples, the do group executes ten times. This paper presents a number of examples to demonstrate how to take advantage of the %do loop to build sas statements dynamically. Chapter 3 reading raw data from external files 29 3. The do statement designates a group of statements that are to be executed as a unit, usually as a part of ifthenelse statements. Heres the simple syntax of the do statement, with descriptions. In the main data step the input file is read and the loop of. Coders corner, 5 pp using the whitlock doloop with the prx perl functions to find.

Below, we run a regression model separately for each of the four race categories in our data. The following statement is an example of a subsetting if. Let us assume that an input sas data file a is sorted by id. The perils of endoffile processing when subsetting data leonard landry, statistics canada, ottawa, ontario, canada abstract endoffile processing in a sas data step occurs when an entire file is read and some specific processing takes place only after the last record is read from the dataset being processed. The correct bibliographic citation for this manual is as follows. How to increment a macro do loop by a noninteger value tree level 3. Sas macro, including macro arrays, and build to more.

Most of the time simply putting the macro variable in the code will suffice. Running the same procedure against a series of data sets in previous examples, the %do loop is used to generate single sas statements. Avoid unnecessary loops in the sas iml language i have some advice on using do loops in sas iml language. Create a sas data set by reading long records from a flat file. For a beginning sas programmer, the most likely approach taken to writing the necessary sas code is to copy and paste the same code over and over for each variable and then changing the variable name.