&1 &2 &3 &4
&5 &6 &7 &8
Read data from disk.
ANALYZER(id) read the data of an analyzer with ID=id (1-dim or 2-dim)
file specifies the name of a file containing the data to be plotted.
It's an ordinary (ASCII) text file created with any text editor (not a word processor !).
Files can also be in compressed form, which is useful to save disk space when the data are read-only.
Files whose name end with .Z, .zip, .gz are assumed
to be compressed with the standard compress, zip and gzip utilities, respectively.
They are uncompressed "on-the-fly" when read.
These optional parameters, identified by their position in the command string,
specify text to be replaced in the file.
They correspond to the placeholders $1, $2, $3, $4, $5, $6, $7 and $8 in the input file
Skip first ll lines in file.
Insert hh as a header.