.pdc and .psc files are PlotCommand files; they contain commands used by plot to generate the figure. They are created by the user (i.e. with an editor) and are input to plot.
.pdg and .psg files are PlotGraphics metafiles; they contain the coordinates etc. for the lines, data and labels of the figure. They are created by plot, are modified by pedit, and are input to plot2ps.
.ps files are PostScript files; they contain PostScript commands describing the finished figure. They are created by plot2ps, and can be output to any PostScript device (e.g. ghostview or a PostScript laser printer).
Originally, spectrum and data plots were created and edited separately, by different programs (plotspec, plotdata, psedit, pdedit). These have since been combined. The choice of filename extension .pdc or .psc has very little effect on the operation of the plot program, and none on pedit or plot2ps. Data and spectrum plots can be mixed, or generated at the same time by the same .pdc or .psc file. The only difference between the .psc and .pdc filename extensions concerns the default meaning of the S command; for .psc files, it generates a linear spectrum plot and is equivalent to the SLIN command, while for .pdc files it defines a symbol size and type to use for data points. SLIN and SLOG can be used in either .psc or .pdc files.
Since all of the above files contain only ASCII text, they can also be edited and mailed by e-mail systems, etc.
To run a program, type its name. You will be prompted for all required input.
Example 1: (demo_plotdata.pdc, excerpts only)
c 4 5 2
lin 100 200 226 80
3 71 0 2.0
x, "" 1
xt, "" 2
y, "({gm}{dN}/eb){u2}" 2
yr, "" 1
s 6 3 1 1 5
d 2 0 3 4 radware:demo_plotdata 4
lin 100 200 183 40
3 71 0 1.0
x, "" 1
xt, "" 1
y, "B(M1; J {su} J-1) / B(E2; J {su} J-2)" 2
yr, "" 1
s 1 3 1 1 2
d 2 0 3 4 radware:demo_plotdata 5
lin 100 200 92 88
3 71 -0.2 2.2
x, "Spin (J)" 2
xt, "" 1
y, "" 2
yr, "" 1
s 2 3 1 1 1
d 2 0 3 4 radware:demo_plotdata 6
s 3 3 1 1 4
d 2 0 3 4 radware:demo_plotdata 7
s 2 3 1 1 1
d 2 0 3 4 radware:demo_plotdata 8
lw 1
ls 4 2 0.1 2
lin 100 200 309 100
3 71 0 2.5
s 0 0 1 2
d 1 0 4 0 radware:demo_plotdata.tou 1
s 0 0 1 2
d 1 0 4 0 radware:demo_plotdata.tou 2
Example 2: (demo_plotspec.psc)
c 4 5 2
lw 0.2 0.8
slin radware:demo
100 300 100 120
200 2048 0 0
x, "E{d{gg}} (keV)" 2 0.5 0
xt, "" 1
y, "Counts per Channel ({s*}10{u3})" 2 0.001 0
yr, "" 1
slin radware:demo
275 125 180 40
850 200 500 0
x, "" 2 0.5 0
xt, "" 1
y, "" 2 0.001 0
yr, "" 1
slog radware:demo
100 300 220 80
200 2048 500 0
x, "" 1
xt, "Channel number" 2
y, "" 2 0.001 0
yr, "" 1
These lines have the following format:
SLIN Spec_File_Name[, Spec_Scale, Spec_Offset] WX_0, WX_Length, WY_0, WY_Length. Ch_0, NChs, Cts_0, NCts. SLOG Spec_File_Name[, Spec_Scale, Spec_Offset] WX_0, WX_Length, WY_0, WY_Length. Ch_0, NChs, Cts_0, NCts.Here square brackets indicate optional data fields.
Following the S/SLIN/SLOG, and on the same line, is the name of the spectrum file containing the data to be plotted. The default file extension is .spe, and the spectrum must be in the standard gf3 spectrum file format. Following the filename you may optionally enter linear transformation coefficients for the counts in the spectrum, Spec_Scale and Spec_Offset. If these are present, the plotted counts-per-channel will be the counts in the spectrum file multiplied by Spec_Scale and added to Spec_Offset, i.e. Plotted_Counts = Spectrum_File_Counts * Spec_Scale + Spec_Offset
The next two lines contain sets of limits for the spectrum display.
First come
WX_0, WX_Length, WY_0, WY_Length.
These are "window" limits specifying the region of the figure to contain the
spectrum, and are given in "figure units".
Then come
Ch_0, NChs, Cts_0, NCts.
These are axis limits for the spectrum. The displayed channels will be Ch_0 to
Ch_0 + NChs, and the y-axis will be from Cts_0 to Cts_0 + NCts. If NCts is
zero, the spectrum will be autoscaled to the largest count-per-channel in the
displayed portion of the spectrum.
These lines have the following format:
LIN [or LOG] WX_0, WX_Length, WY_0, WY_Length.
DataX_0, NDataX, DataY_0, NDataY.
Following the LIN/LOG, and on the same line, comeLines beginning with D (or d) specify the source of the next set of data to be drawn on the figure. As illustrated in the example, several data can be drawn in different regions ("windows") of the figure.
These lines have the following format:
S Symbol_ID, Symbol_Size, Join_Flag[, Color[, Symbol_ID2]] D Column_X, Column_DX, Column_Y, Column_DY[, Data_File_Name, Data_Set_Number] [ data1, data2, ...] [ data1, data2, ...] [ ... ] [ (blank line) ]Here square brackets indicate optional data fields.
Symbol_ID and Symbol_ID2 are integers between 0 and 13, and specify the symbol(s) tobe used to represent the data points, as follows:
0 - no symbol (can be used to draw lines only)
1 - open circles
2 - filled circles
3 - open squares
4 - filled squares
5 - open diamonds
6 - filled diamonds
7 - open upwards-pointing triangles
8 - filled upwards-pointing triangles
9 - open downwards-pointing triangles
10 - filled downwards-pointing triangles
11 - plus (+)
12 - cross (x)
13 - asterisk (*)
If Symbol_ID2 is specified, odd-numbered data points are drawn with the symbol
Symbol_ID, while even-numbered data points are drawn with the symbol
Symbol_ID2, i.e., alternating symbols are used.Symbol_Size is the size of the symbols in "figure units".
Join_Flag is can be either 0 or 1; a value of 1 will cause the data points to be joined ny straight line, whereas a value of 0 will not.
Color specifes an optional color index for the symbols and lines representing the data set. The default value is 1 (black).
Column_X, Column_DX, Column_Y and Column_DY are integers, specifying columns of data numbers to be used as the source of data values X, Delta-X, Y and Delta-Y, respectively. For example, if you had a file with data points listed as Y, DY, X, you would use 3, 0, 1 and 2 for the column specifiers, respecively. A value of zero for Column_DX or Column_DY indicates that X- or Y-error bars are not to de drawn on the data points.
The data values can either be included directly in the .pdc file (as shown by the data1, data2, ... lines) or taken from another file. In the latter case, the name of the source file must be provided following the Column_DY field. Such data files may contain many data sets separated by blank lines. Data_Set_Number specifies which data set should be used; it must be in integer greater than zero.
All data sets, whether included in the .pdc file or in a separate file, must end in a blank line. Lines beginning with asterisks are treated as comments and are ignored; this is useful for labeling the different data sets and/or temporarily removing data points from the set.
The default file extension for Data_File_Name is .dat.
These lines have the following format:
X[T] "Axis_Label", Axis_Flag[, Axis_Scale, Axis_Offset]Here square brackets indicate optional data fields. Following the X/XB/XT, and on the same line, at least two data fields are required. The first is the title or label for the axis, and must be enclosed in double quotes as shown in the figure. If no label is wanted, put a pair of double quotes enclosing a null string. The second field is a flag containing the value 0, 1 or 2, which specifies whether or not ticks and/or numbers are required on the axis. A 0 generates a simple axis with no ticks or numbers, a 1 generates an axis with ticks but no numbers, and a 2 generates an axis with both ticks and numbers.
Following the axis flag you may optionally enter linear transformation
coefficients for the data, Axis_Scale and Axis_Offset. If these are present,
the axis units will be set to the data x-value or spectrum channel number
multiplied by Axis_Scale and added to Axis_Offset, i.e.
Axis_Units = Data_X * Axis_Scale + Axis_Offset.
Lines beginning with Y (or y) cause a Y-axis to be drawn for the most-recently defined data or spectrum display. A simple Y is equivalent to YL, and generates the axis to the left of the data display. YR generates the axis to the right of the display.
These lines have the same format as the X-axis lines above, i.e.
Y[R] "Axis_Label", Axis_Flag[, Axis_Scale, Axis_Offset]The data fields have exactly the same meanings and functions as for the X-axis above.
These lines have the following format:
LW line-width-1[, line-width-2]Here square brackets indicate optional data fields. A value of zero specifies the use of the default linewidth. Line-width-1 is used for drawing spectra and for the lines joining data points, while Line-width-2 is used for the axes and symbols, and for vectors added by pedit.
These lines have the following format:
LS d1[, d2[,d3, d4]]Here square brackets indicate optional data fields. Non-specified values default to a value of zero.
If d1 is zero, a normal, continuous line is drawn. Otherwise, a dashed line is drawn, present for a distance of d1 units, absent for a distance of d2 units, present again for d3 units and absent again for d4 units. This pattern is then repeated to cover the entire length of the line. For example, the values ls 4 4 would give a dashed line, while ls 4 2 0.1 2 gives a dash-dotted line.
To see which characters and symbols are generated by the {g...} and {s...} commands, look at the file demo_drawstr.ps.
Vectors Labels Label Peaks w/Cursor Find & Label Peaks Zoom/Expand Display Unzoom Display Exit ProgramVectors are lines such as axes and axis ticks or other lines drawn on the figure; Labels can be numbers on the axes, peak labels, data titles, etc. Vectors and labels can be added, deleted and moved. Peaks in displayed spectra can be labelled one at a time with the Label Peaks w/Cursor option, or the Find & Label Peaks option can label many peaks in a spectrum using a peak find routine.
pedit does not attempt to reproduce the correct aspect ratio of the figure in its display. For this reason, the characters in labels etc may appear to be very distorted. However, when the figure is used to create a PostScript file, the proper aspect ratio will be used.
When you exit from the program, a new version of the .pdg or .psg file will be created, which includes all of your modifications.
demo/demo_plotdata.pdg and demo/demo_plotspec.psg are demonstration files that can be used to familiarise yourself with pedit; please make your own copy of these files so that the originals are not changed.
Here is a sample spectrum plot.
Here is a sample data plot.
