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III. The Table Storage Option (MS-DOS Systems only) The table storage option allows the user to write out the contents of up to ten of the X-11.2 tables out to files other than the usual X-11.2 output. The tables selected are written into separate ASCII files without the headings and titles found on the X-11.2 printout. This option makes it easier to use the output of X-11.2 runs as input to other software packages. This option is invoked by setting the variable NUMTBL of the NLX11 namelist equal to the number of tables to be stored. If this is done, you can use the NLTBL namelist to identify the tables you wish to store (with the TBL array), the format of the table output (with TBLFMT), and other options as you see fit. If NUMTBL is zero, the table storage option is not invoked and you will not be asked to supply values for NLTBL. A complete description of the variables in the NLTBL namelist is given in Table C. The printout option selected using the variable PRTOUT of the NLX11 namelist (see Table A) must include the table or tables to be stored. Table B.2 of Appendix B shows the tables associated with each choice of PRTOUT. X-11.2 uses information available to the program to determine into which file a table will be stored. In DOS, a file specification consists of three parts : (a) the drive specifier, which specifies the drive which contains the file; (b) the filename, which can be up to eight characters; (c) the filename extension, which can be up to three characters (preceded by a period). For the file A:COMP1F.DAT, the drive specifier is A:, the filename is COMP1F, and the filename extension is .DAT. For table storage in X-11.2, these three parts are defined as follows : (a) the drive specifier is set equal to the variable DRIVE from the NLX11 namelist; (b) the filename is set equal to the name of the series being adjusted, stored in SER from the NLX11 namelist; (c) the filename extension is set equal to the number of the table as it appears in the X-11.2 printout (preceded by a period), taken from one of the entries in the TBL array of the NLTBL namelist. If the number of a table is entered with an internal space ('D 8'), the space will be replaced by the character '_' ('D_8'). A complete listing of the table numbers for each of the X-11.2 tables is given in Table B.1 of Appendix B. In an X-11.2 run where SER='COMP1F' and DRIVE='B:', table D10 (the final seasonal factors), if selected, would be stored in file B:COMP1F.D10. The seasonal factors stored in this file would be the same as those found in the X-11.2 output, just stored in its own separate file. If the file is to be stored in an existing directory or subdirectory, the name of the directory or subdirectory should be included in the variable DRIVE. For example, if the above file were to be stored in B:\X11SS\COMP1F.D10, DRIVE should be set equal to 'B:\X11SS\'. Note that all colons and backslashes should be included in DRIVE. Normally, X-11.2 will overwrite the contents of an existing file with the same name. However, if OVERIT of the NLTBL namelist is set to 'N', X-11.2 will attempt to store the table in a new file, which it creates. Two characters will be appended to the filename specifier; the first a dollar sign ($), the second one of the following set of characters: (a) the whole numbers (0 to 9); (b) the alphabet (A to Z); (c) ASCII characters #, $, %, &. To illustrate this, let's assume that A:COMP1F.D10 already exists. X-11.2 will then try to store table D10 in a file named A:COMP1F$0.D10. If this file exists, X-11.2 will try to store the table in A:COMP1F$1.D10, and so on, until either the program finds a file which does not exist or the program runs out of acceptable characters. If more than one table is being stored, X-11.2 checks to ensure that, for each table being stored, all the files have the same filename and that no existing files will be overwritten. If the variable OVERIT of the NLTBL namelist is set to 'A' (append), then rather than overwriting an existing file the contents of the table to be stored will be appended to the end of an existing file. If OVERIT is set to 'O' (one table), then all the tables selected will be stored in one file (named X11SS.TBL). The drive for this file will be taken from the variable DRIVE in the NLTBL namelist. If a previous version of X11SS.TBL exists, it will be overwritten. The formats available for table storage are the same as those available for data and prior factor input. The user can select one of the X-11.2 supplied formats, or specify his/her own. Finally, note that NLTBL has its own reset variable, TRESET. This allows you to leave the storage options as they are while resetting variables from other namelists to their default values. If TRESET = ' ', TRESET is set to be the same as RESET. WARNING : This option may not work correctly with operating systems different from MS- (or PC-) DOS.  IV. Running X-11.2 This section will (a) show how to run X-11.2 interactively, (b) show how to set up a file of stored X-11.2 commands and run X-11.2 with it, (c) discuss examples of sample X-11.2 runs. The compiled program (called X11SS.EXE) can be used only on IBM PC- compatible microcomputers having a math coprocessor (8087, 80287, or 80387). For the examples given in this document, a computer with two disk drives was used (both drives are not used in all of the examples). There is a basic command sequence for running X-11.2, regardless of whether the program is run interactively or with stored commands. In an X-11.2 run involving many series, this sequence must be repeated for each series. The sequence is given below: (1) Assign values to variables and arrays in the NLX11 namelist. See the previous section for more information on namelist input. (2) Assign values to variables and arrays in the NLXOP namelist. (3) If the table storage option is used in this run, assign values to variables and arrays in the NLTBL namelist. (4) Specify a title for the X-11.2 run. The user can (a) simply enter a title of up to eighty characters in length; (b) enter the character "@", to use the previous title; (c) enter the character "*", to print out the previous title for examination. Please note that "*" is only to be used with interactive X-11.2 runs. If '*' is specified, X-11.2 will ask the user to specify a title or "@" again. (5) Specify the data file containing the time series for this X-11.2 run. The user can (a) enter the name of the data file (up to 80 characters long); (b) enter "@" or "*" as described in (4). (6) Specify the output file to be used with this X-11.2 run. The user can (a) enter the name of the output file (up to 80 characters long); (b) enter "@" or "*" as described in (4). (7) If prior monthly adjustment factors are used in this run, specify the prior monthly factor file. The user can (a) enter the name of the prior monthly factor file (up to 80 characters long); (b) enter "@" or "*" as described in (4). This can be repeated for as many series as you wish to run. To stop executing X-11.2, set the variable STOP='Y' in any of the X-11.2 namelists. We now turn to the three examples of X-11.2 runs provided in this document. In each of these examples, the entries made by the user are numbered to illustrate the steps.  EXAMPLE 1 : An Interactive X-11.2 Run Table D gives an example of how to run X-11.2