# Comments (lines beginning with "#") and empty lines are ignored in format
# files.

# Set font and point size for font group "l" (labels).
sf l Fs,P20

# Define two custom font groups, "fontgroup1" and "fontgroup2".
sf fontgroup1 W40,G.2
sf fontgroup2 Fh-b,P30,G.8

# Plot the data three times, first with a broad dark line, then with a medium
# light line, finally as a scatter plot with open diamonds (symbol 2)
p 0,1n(fontgroup1) 0,1n(W10,G.8) 0,1S2

# Print the plot title.
t (fontgroup2) This is an example

# Local specifications are given below for the x and y axis titles.  These
# would override defaults for the predefined title (-sf t ...) font group had
# any been set.
x (Fc-o,P15) This is the x axis
y (Fc,P6) This is the y axis

# The label uses font group l defaults set above unless local instructions are
# given.  The choice of font "s" (Symbol) above means that the Roman letters
# in the label string are rendered as Greek letters on the plot.
L .1 .87 - l = t + g

# Set y axis parameters.  By specifying the crossing point at x = -10, we
# place the y axis away from the data at x=0, and the axes do not actually
# touch each other.
ya -2 2 - - 2 -10

# Construct the legend (key).  The final argument (.1) of the lp option
# lengthens the sample plot segment to 10% of the x axis length.  Three
# entries are overlaid on line 0 of the legend in order to construct a
# sample plot segment with the same appearance as in the data plot.
lp .65 .15 1.05 .1
le 0 0 dummy data
le 0 1
le 0 2

# Draw an arrow, using local specifications for the point size (determines
# the size of the arrowhead), grey level, and line width.
a (P30,G.6,W30) 30 -1.3 50 -1.7

# Label the arrow, overriding the default font so that the label is printed
# using Roman rather than Greek characters.
l (Ft) 50 -1.8 - arrow

# Demonstrate line segment drawing using local specifications.  First draw
# a broad black line segment, then a narrow white line segment over the first.
c (W100,G0) 0 1.8 100 1.8
c (W2,G.99) 0 1.8 100 1.8