I think you forgot to attach that text file, but there is plenty of information about reading text files that I would recommend you checking out. The best thing to check out would be the examples that ship with LabVIEW, which can be accessed by going to Help>>"Find Examples...". I have also linked the help documentation on reading text files
here. As for the analog output portion of your question, I would recommend posting any DAQ-specific questions in the DAQ area of these discussion forums!
Kind Regards,
E. Sulzer
Applications Engineer
National Instruments