摘要: Do-loops are used to repeat a sequence of operations. Here is an example. Each row of data in the fil[阅读全文]

摘要: Used in the datastep, the drop statement drops variables from the data set. Example: data score; infi[阅读全文]

摘要: SAS filename statements make it easier to refer to files stored on the computer system. The fileref t[阅读全文]

摘要: Conditional statements (if-then statements, if-then-else statements) are often used to assign values[阅读全文]

摘要: The infile statement replaces the cards statement when data is to be read from a file already on disk[阅读全文]

摘要: Informats are used to read in data that does not conform to the default SAS length restrictions. Info[阅读全文]

摘要: The input statement is used in the datastep to read raw data from data cards and assign the data as v[阅读全文]

摘要: Used in the datastep, the keep statement explicitly specifies which variables are to be retained in t[阅读全文]

摘要: The keys window displays the current assignment of function keys to display manager commands. The key[阅读全文]

摘要: Labels of length up to 40 characters (including blanks) can be attached to SAS variables. This partia[阅读全文]

摘要: The libname statement is used to create a library reference, or libref, for a SAS catalog. The syntax[阅读全文]

摘要: The linesize option is used in either the infile statement or in the options statement. A synonym is[阅读全文]

摘要: Values of variables which are missing or unobtainable can be set to the SAS missing value symbol . (p[阅读全文]

摘要: The missover option in the infile statement is used to assign the SAS missing value to variables not[阅读全文]

摘要: An internal SAS counter in the data step which contains the current iteration number of the data step[阅读全文]

摘要: SAS names, for variables or data sets, are limited to a length of 8 characters with no embedded blank[阅读全文]

摘要: The output statement is used in the datastep to write the current values of all variables to a data s[阅读全文]

摘要: The pageno option sets the number of the next page of SAS output. This is often typed in the program[阅读全文]

摘要: The pagesize option (synonym ps) sets the number of lines per page in the SAS output window. Example:[阅读全文]

摘要: The retain statement is used to hold the values of variables accross iterations of the data step. Nor[阅读全文]