Format of the datafile

Datafile containing data to be plotted must be ASCII text file, deliminated with space, tab, or comma.
Data series to be loaded is specified as the column number. Therefore, the data must be arranged in columns, not in rows.
Example: "Meteorological Condition990301.dat" loaded by Demo1.fig
Extension
Any extension can be used. However, default extensions in the open-dialog, ".dat", ".xy", ".prn", ".in", "out", ".txt", or "csv", are recommended.
Handling of lacking data
A blank line in the data file results in a break in the line connecting data points.