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GSI
FRS
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LINE-MODE OPTIONS
The header line in a GRAF dataset defines the nature of the following data and
their representation.
==> H: X
Y,LTR1
10
25.4
12
36.9
14
47.2
The letters following the comma (in the example LTR) specify the line mode. The
above example shows a thick read line. The number defines the data symbol.
The line mode of GRAF data is specified by the following letters:
first group:
",N" no line
",L" full lines ( = default)
",P" dotted lines
",D" dashed lines
",M" dashed-dotted lines
second group:
"S" smooth lines (see parameter WEIGHT of the
command "GDISP" or "GPLOT")
(if the coordinates of a point are
repeated in another
line, the smoothing is
interrupted at this point)
"F" fit a polynomial to the data
(draw the line over the whole
picture)
"FF" fit a polynomial to the data
(draw the line only between
data points)
"H" histogram
(see footnote)
"HH" histogram, full
( " )
"I" histogram with vertical lines
( "
)
"II" histogram with small hatching
( "
)
"E" histogram with statistical error bars (
" )
"A" histogram, vertically hatched
( "
)
"C" histogram, horizontally hatched
( "
)
"AC" combination of "A" and "C"
(
" )
"J" histogram, hatched (45 degr.)
( "
)
"K" histogram, hatched (135 degr.)
( "
)
"JK" combination of "J" and "K"
(
" )
(For the hatching, the
distance of the lines is
defined by the
parameter "SYMBOL(s)" of the
command "GDISP" or
"GPLOT")
"U" columns (width defined by SYMBOL(s) or
COLUMN(c) )
"UU" columns, full
( " )
"V" columns, with vertical lines (
" )
"W" columns, hatched
(
" )
third group:
"T" thick lines (width defined by SYMBOL(s) or
LINE(l) )
"TT" thick lines with double line width
"TTT" thick lines with triple line width
forth group:
"O" hatched area inside a polygon (fine hatching)
"AO"
"
(vertical)
"CO"
"
(horizontal)
"ACO"
"
(vert. and hor.)
"JO"
"
(45
degrees)
"KO"
"
(135
degrees)
"JKO"
"
(45
and 135 degrees)
( The width of the hatched lines for the 6 last options can be changed by the
parameter LINEWIDTH, but only when CMODE(3) is specified. The parameter HATCHING defines
the distance of the lines.)
"OO" full area inside a polygon
( An area can be filled if it is defined by a polygon of straight lines (line
modes L,P,D,M), even if they are not drawn (line mode N). The area may also be defined by
smooth lines (line mode S) with a parameter WEIGHT > 0. While filling areas defined by
smooth lines with WEIGHT = 0 or by polynomials, difficulties may occur.)
fifth group (colors)
",R" red
",RG"
yellow
",G" green
",GB"
pink
",B" blue
",BR"
turquoise
If supported by the device, additional colors may be chosen by additive
mixing several letters (==>GGR).
One letter (or letter combination) of each group may be specified
(==> PS defines a smooth dashed
line)
The sequence of the different options is free.
The histograms (line symbol H) are drawn in the following way:
The content Y(i) of the channel X(i) is taken to be valid from the channel-number limit X(i) to X(i+1). Thus, the value of X(i+1)
simultaneously defines the end of the bin (i) and the begin of bin (i+1). This procedure enables the handling of a
variable bin size.
If you want to center the histogram bin around its nominal value, please shift the data by a data modification in the header line:
==>
H: X-0.5 Y,H0
You may also use columns (line symbol U) which are centered at the given x value.
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