gnuplot documentation

24 BOXES gnuplot 4.3 41
The boxwidth will come from the fourth column if
the y errors are given as "ydelta" and the boxwidth
was not previously set to -2.0 (set boxwidth -2.0)
or from the fifth column if the y errors are in the
form of "ylow yhigh". The special case boxwidth
= -2.0 is for four-column data with y errors in the
form "ylow yhigh". In this case the boxwidth will
be calculated so that each box touches the adjacent
boxes. The width will also be calculated in cases
where three-column data are used.
with boxerrorbars
The box height is determined from the y error in the same way as it is for the yerrorbars style — either
from y-ydelta to y+ydelta or from ylow to yhigh, depending on how many data columns are provided.
See also
errorbar demo.
24 Boxes
The boxes style is only relevant to 2D plotting. It
draws a box centered about the given x coordinate
that extends from the x axis (not from the graph
border) to the given y coordinate. It uses 2 or 3
columns of basic data. Additional input columns
may be used to provide information such as variable
line or fill color (see rgbcolor variable (p. 33)).
2 columns: x y
3 columns: x y x_width
with boxes
The width of the box is obtained in one of three ways. If the input data has a third column, this will
be used to set the width of the box. If not, if a width has been set using the set boxwidth command,
this will be used. If neither of these is available, the width of each box will be calculated automatically
so that it touches the adjacent boxes.
The interior of the boxes is drawn according to the current fillstyle. See set style fill (p. 131) for
details. Alternatively a new fillstyle may be specified in the plot command.
For fillstyle empty the box is filled with the background color.
For fillstyle solid the box is filled with a solid rectangle of the current drawing color. There is an
optional parameter that controls the fill density; it runs from 0 (background color) to 1
(current drawing color).
For fillstyle pattern the box is filled in the current drawing color with a pattern, if supported by the
terminal driver.
Examples:
To plot a data file with solid filled boxes with a small vertical space separating them (bargraph):
set boxwidth 0.9 relative
set style fill solid 1.0
plot ’file.dat’ with boxes
To plot a sine and a cosine curve in pattern-filled boxes style:
set style fill pattern
plot sin(x) with boxes, cos(x) with boxes
The sin plot will use pattern 0; the cos plot will use pattern 1. Any additional plots would cycle through
the patterns supported by the terminal driver.
To specify explicit fillstyles for each dataset: