Rongo Command Reference

Jun Makino 2004/01/05

Alphabetical list of all implemented commands

angle d - sets angle of text or points to d degrees

box (xopt yopt) - makes a box labelled according to arguments

Box behaves quite differently than in original mongo.

 Options (for parameters XOPT and YOPT):
 A : draw Axis (X axis is horizontal line Y=0, Y axis is vertical
     line X=0).
 B : draw bottom (X) or left (Y) edge of frame.
 C : draw top (X) or right (Y) edge of frame.
 G : draw Grid of vertical (X) or horizontal (Y) lines.
 I : Invert the tick marks; ie draw them outside the viewport
     instead of inside.
 L : label axis Logarithmically (see below).
 N : write Numeric labels in the conventional location below the
     viewport (X) or to the left of the viewport (Y).
 P : extend ("Project") major tick marks outside the box (ignored if
     option I is specified).
 M : write numeric labels in the unconventional location above the
     viewport (X) or to the right of the viewport (Y).
 T : draw major Tick marks at the major coordinate interval.
 S : draw minor tick marks (Subticks).
 V : orient numeric labels Vertically. This is only applicable to Y.
     The default is to write Y-labels parallel to the axis.
 1 : force decimal labelling, instead of automatic choice (see PGNUMB).
 2 : force exponential labelling, instead of automatic.

Some example of reasonable arguments are:

  BCNTSV BCNTSV (this is default) This creates a box with ticks
  in all sides, and numeric labels at left and bottom

  BCNTSVL BCNTSVL This creaets logarithmic ticks (and labels) for
  both horizontal and vertical axes.

connect - connects (x,y) pairs read by x and ycolumn with line segments
data fspec - opens the file "fspec" for reading data
dot - makes a point of the current style at the current location
draw x y - draws a line to (x,y) from the last coordinate
erase - erases the graphics screen or initializes a printer plot
expand e - expands all characters or points by a factor e
fcolumn [x/y] expression - reads x or y data from current data file.
This is an extension of the standard xcolumn or ycolumn command. Instead of reading from a fixed column, this command reads the entire line and evaluate the expression specified in the second argument. The data in columns are specified as "cx", where x is a number. For example,
```
  fcolumn x c1*c1
```
sets the square of the first column to x data. Any valid expression of Ruby can be used here. This command tries to convert all columns to numbers, unless there is a column starting with "#". All data after "#" will be ignored.
justification
used as replacement for "putlabel x". You can say
```
  justfication center
  justfication left
  justfication right
```
which will affect the justification of the subsequent texts printed by label command.
limits (x1 x2 y1 y2) - sets the limits of the plot (no args for auto)
ltype n - sets the line type to n
lweight n - sets the line weight to n
points - draws points of the current style at the (x,y) of x and ycolumn
psfix (filename) - add the correct boundingbox at the beginning of the file, instead of the end.
printer devicename - directs output to a hardcopy printer.
If no argument is given, "pgplot.ps/vcps" is assumed

ptype n s - sets the point type to an n-gon of style s

      PTYPE n s causes points to be drawn as n sided polygons of a style
      s, where s refers to:
                      0 = open
                      1 = skeletal (center connected to vertices)
                      2 = starred
                      3 = solid
      PTYPE will also accept one argument which is a composite = 10*n + s.

quit
In mongo, you can use "end", but since "end" is a reserved word in Ruby we need to use something else.
relocate x y - sets the current coordinates to (x,y)
squareview - force a squre viewport
This command is useful to make a square plot (which I like)
terminal devicename - directs output to a graphics terminal
The argument is the same as that for PGOPEN. If no argument is given, "/xserve" is assumed
viewport x0 x1 y0 y1
change viewport, relative to the current viewport
writeb filename
write the command history to file filename (works only in the interactive mode)
xcolumn n - reads x data from column n of the current file
ycolumn n - reads y data from column n of the current file
xdata array - set xdata from Ruby array array
ydata array - set ydata from Ruby array array
xlabel … - writes the label … centered under the x axis
xlogarithm - takes the logarithm of x values from XCOLUMN
ylabel … - writes the label … centered left of the y axis
ylogarithm - takes the logarithm of y values from YCOLUMN