This just means that when you restart SAS, you will need reload the library again in order to access its contents. When you end your SAS session, any libraries that you’ve defined will be lost. For example, if we have a dataset named sample stored in the folder ‘C:\Users\Research\Thesis’, which we’ve told SAS is the location of our library called practice, then we refer to that dataset as practice.sample The second part of the name (after the period) is the dataset’s name. The first part of the name (before the period) is the dataset’s library assignment. Once a library has been assigned to a location with a SAS dataset, the dataset can be referred to in statements using two parts: libref.SAS-dataset-name You will get an error message if you try to refer to a dataset that has not yet been pointed to in a LIBNAME statement. Most SAS users put their LIBNAME statements at the beginning of the program, but you can put a LIBNAME statement anywhere in the program as long as it comes before you reference a file in that location. (This folder must already exist on your computer.) Here is an example LIBNAME statement that creates the library named practice and assigns it to a folder in the directory ‘C:\Users\Research\Thesis.’ LIBNAME practice 'C:\Users\Research\Thesis' Finally, the text in quotes is what path name you tell SAS to assign the library to. It must be eight or less characters and start with a letter. The second word ( libref) is what you name the library. Here the first word ( LIBNAME) is the SAS keyword that tells it to create a library. The format of the LIBNAME statement is: LIBNAME libref 'Folder path name here' A LIBNAME statement is one of those global statements that we mentioned in Section 1 that does not occur in a data step or a proc step. A library is assigned a location with a LIBNAME statement in SAS. One or many datasets can be assigned to the same library. Alternatively, you can create your own data in SAS, which is also covered below. If it is stored as a file other than SAS (Excel, SPSS, text, etc.) then you’ll need to help SAS read it with one of the methods described in the next sections of this tutorial. If the data you want to work with is already a SAS dataset stored somewhere on your computer, then all you need to do to start working with your data is assign a library name to the location of the dataset. SAS libraries allow users to safely store things like data sets and user-defined formats so that they can be accessed without having to reload or re-read them from an external file every time SAS is started.
#How to import excel file into sas university edition code#
When the above code is executed, we get the following output.A SAS library is a folder located on a user's disk drive or on the internet that is specially designated for use by SAS. '/folders/myfolders/TutorialsPoint/empdtls.txt' dlm = ':' To read the hierarchical file we use the below code in which we identify the header record with an IF clause and use a do loop to process the details record. The first record is the header record mentioning the department and the next record few records starting with DTLS are the details record. In the below file the details of each employee under each department is listed. Below is an illustration of a hierarchical file. The number of details records can vary from one observation to another. For a given observation there is a header record below which many detail records are mentioned. In these files the data is present in hierarchical format. The above code reads the data from excel file and gives the same output as above two file types. "/folders/myfolders/TutorialsPoint/emp.xls" Assuming the file emp.xls is available locally in the SAS environment. As seen in the chapter SAS data sets, it can handle a wide variety of file types including MS excel. SAS can directly read an excel file using the import facility. When the above code is executed, we get the following output. '/folders/myfolders/sasuser.v94/TutorialsPoint/emp.csv' dlm="," In the below example we read the data file named emp.csv from the local environment. In this case we use the dlm option in the infile statement. These are the data files in which the column values are separated by a delimiting character like a comma or pipeline etc. Input empID empName $ Salary Dept $ DOJ date9. '/folders/myfolders/sasuser.v94/TutorialsPoint/emp_data.txt' In the below example we read the data file named emp_data.txt from the local environment. We read this file using the Infile statement available in SAS. Let’s consider an ASCII file containing the employee data. The data is usually delimited by a space, but there can be different types of delimiters also which SAS can handle. These are the files which contain the data on text format. The file formats used in SAS environment is discussed below. SAS can read data from various sources which includes many file formats.
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