GNUPlot Manual

36 SET-SHOW gnuplot 4.0 63
36.14.3 Set datafile commentschars
The set datafile commentschars command allows you to tell gnuplot what characters are used in
a data file to denote comments. Gnuplot will ignore rest of the line behind the specified characters if
either of them is the first non-blank character on the line.
Syntax:
set datafile commentschars {""}
show datafile commentschars
unset commentschars
Default value of the string is "#!" on VMS and "#" otherwise.
Then, the following line in a data file is completely ignored
# 1 2 3 4
but the following
1 # 3 4
produces rather unexpected plot unless
set datafile missing ’#’
is specified as well.
Example:
set datafile commentschars "#!%"
36.15 Decimalsign
The set decimalsign command selects a decimal sign for numbers printed into tic labels or set label
strings.
Syntax:
set decimalsign {}
unset decimalsign
show decimalsign
The argument is the string to be used in place of the usual decimal point. Typical choices
include the period, ’.’, and the comma, ’,’, but others may be useful, too. If you omit the
argument, the decimal separator is not modified from the usual default, which is a period. Unsetting
decimalsign has the same effect as omitting .
Example:
Correct typesetting in most European countries requires:
set decimalsign ’,’
36.16 Dgrid3d
The set dgrid3d command enables, and can set parameters for, non-grid to grid data mapping.
Syntax:
set dgrid3d {} {,{} {,}}
unset dgrid3d
show dgrid3d
By default dgrid3d is disabled. When enabled, 3-d data read from a file are always treated as a scattered
data set. A grid with dimensions derived from a bounding box of the scattered data and size as specified
by the row/col size parameters is created for plotting and contouring. The grid is equally spaced in x