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5 Command file: Reading the data 63Combining rows from separate filesNewASReml can read data from multiple files provided the files have the same layout.The file specified as the ’primary data file’ in the command file can contain linesof the form!INCLUDE !SKIP nwhere is the (path)name of the data subfile and !SKIP n is anoptional qualifier indicating that the first n lines of the subfile are to be skipped.After reading each subfile, input reverts to the primary data file.Typically, the primary data file will just contain !INCLUDE statements identifyingthe subfiles to include. For example, you may have data from a series of relatedexperiments in separate data files for individual analysis. The primary data filefor the subsequent combined analysis would then just contain a set of !INCLUDEstatements to specify which experiments were being combined.If the subfiles have CSV format, they should all have it and the !CSV file should bedeclared on the primary datafile line. This option is not available in combinationwith !MERGE.5.8 Job control qualifiersThe following tables list the job control qualifiers. These change or control variousaspects of the analysis. Job control qualifiers may be placed on the datafile lineand following lines. They may also be defined using an environment variablecalled ASREML QUAL. The environment variable is processed immediately after thedatafile line is processed. All qualifier settings are reported in the .asr file. Usethe Index to check for examples or further discussion of these qualifiers.Important Many of these are only required in very special circumstances andnew users should not attempt to understand all of them. You do need to understandthat all general qualifiers are specified here. Many of these qualifiers arereferenced in other chapters where their purpose will be more evident.