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5 Command file: Reading the data 465.1 Introduction5.2 Important rulesIn the code box to the right is the ASRemlcommand file nin89a.as for a spatial analysisof the Nebraska Intrastate Nursery (NIN) fieldexperiment introduced Chapter 3. The linesthat are highlighted in bold/blue type relateto reading in the data. In this chapter we usethis example to discuss reading in the data indetail.NIN Alliance Trial 1989variety !Aidpidrawrepl 4nlocyieldlatlongrow 22column 11nin89aug.asd !skip 1yield ∼ mu variety1 211 column AR1 .42422 row AR1 .904In the ASReml command file• all characters following a # symbol on a line are ignored,• all blank lines are ignored,• lines beginning with ! followed by a blank are copied to the .asr file ascomments for the output,• a blank is the usual separator; tab is also a separator,New• maximum line length is 2000 characters,• a comma as the last character on the line is used to indicate that the currentlist is continued on the next line; a comma is not needed when ASReml knowshow many values to read,• reserved words used in specifying the linear model (Table 6.1) are case sensitive;they need to be typed exactly as defined: they may not be abbreviated.• a qualifier is a particular letter sequence beginning with an ! which sets anoption or changes some aspect of ASReml;– some qualifiers require arguments,– qualifiers must appear on the correct line,– qualifier identifiers are not case sensitive,– qualifier identifiers may be truncated to 3 characters.