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5 Command file: Reading the data 595.6 Datafile lineThe purpose of the datafile line is to• nominate the data file,• specify qualifiers to modify– the reading of the data,– the output produced,– the operation of ASReml.NIN Alliance Trial 1989variety !A.row 22column 11nin89aug.asd !skip 1yield ∼ mu variety.Data line syntaxThe datafile line appears in the ASReml command file in the formdatafile [qualifiers]• datafile is the path name of the file that contains the variates, factors, covariates,traits (response variates) and weight variables represented as data fields,see Chapter 4; enclose the path name in quotes if it contains embedded blanks,• the qualifiers tell ASReml to modify either– the reading of the data and/or the output produced, see Table 5.2 below fora list of data file related qualifiers,– the operation of ASReml, see Tables 5.3 to 5.6 for a list of job control qualifiers• the data file related qualifiers must appear on the data file line,• the job control qualifiers may appear on the data file line or on following lines,• the arguments to qualifiers are represented by the following symbolsf — a filename,n — an integer number, typically a count,p — a vector of real numbers, typically in increasing order,r — a real number,s — a character string,t — a model term label,v — the number or label of a data variable,vlist — a list of variable labels.