+=pod
+
=head1 NAME
rrdgraph_graph - rrdtool graph command reference
B<COMMENT>B<:>I<text>
-B<VRULE>B<:>I<vname>B<#>I<color>[B<:>I<legend>]
+B<VRULE>B<:>I<time>B<#>I<color>[B<:>I<legend>]
-B<LINE>I<width>B<:>I<vname>B<#>I<color>[B<:>I<legend>][B<:>B<STACK>]
+B<LINE>[I<width>]B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
-B<AREA>B<:>I<vname>B<#>I<color>[B<:>I<legend>][B<:>B<STACK>]
+B<AREA>B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
B<TICK>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<fraction>[B<:>I<legend>]]
=cut
-B<PART>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>]
+#
+#B<PART>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>]
+#
=pod
These instructions allow you to generate your image or report.
If you don't use any graph elements, no graph is generated.
-Similarly no report is generated if you don't use print options.
+Similarly, no report is generated if you don't use print options.
=head1 PRINT
=over 4
-=item B<PRINT:>I<vname>B<:>I<CF><:>I<format>
-
-I<Deprecated. Use the new form of this command in new scripts.>
-The first form of this command is to be used with B<CDEF> I<vname>s.
=item B<PRINT:>I<vname>B<:>I<format>
=item *
-B<%#.#le> prints like 1.2346e+04. Optional numbers # are field width and
-decimal precision
+B<%#.#le> prints numbers like 1.2346e+04. The optional integers # denote field
+width and decimal precision.
=item *
-B<%#.#lf> prints like 12345.6789, with optional field width and precision
+B<%#.#lf> prints numbers like 12345.6789, with optional field width
+and precision.
=item *
B<%s> place this after B<%le>, B<%lf> or B<%lg>. This will be replaced by the
appropriate SI magnitude unit and the value will be scaled
-accordingly (123456 -> 123.456 k)
+accordingly (123456 -> 123.456 k).
=item *
-B<%S> is similar to B<%s>. It does however use a previously defined
+B<%S> is similar to B<%s>. It does, however, use a previously defined
magnitude unit. If there is no such unit yet, it tries to define
-one (just like B<%s>). However, if the value is zero, the magnitude
+one (just like B<%s>) unless the value is zero, in which case the magnitude
unit stays undefined. Thus, formatter strings using B<%S> and no B<%s>
will all use the same magnitude unit except for zero values.
=item *
-B<%a, %A> prints abbreviated, full weekday name
+B<%a, %A> print the abbreviated or full name of the day of the week.
=item *
-B<%b, %B> prints abbreviated, full month name
+B<%b, %B> print the abbreviated or full name of the month.
=item *
-B<%d, %m, %y, %H, %M, %S> day,month,year,hour,minute,second all in two-digit format
+B<%d, %m, %y, %H, %M, %S> print day, month, year, hour, minute, and
+second in two-digit format.
=item *
-B<%Y> year in 4-digit format
+B<%Y> prints the year in 4-digit format.
=item *
-B<%I, %p> hour (01..12), 'am' or 'pm'
+B<%I, %p> print the hour (01..12), 'am' or 'pm'.
=item *
-B<%j, %w> day of the week (0..6), day of the year (1..366)
+B<%j, %w> print day of the week (0..6), day of the year (1..366)
=item *
-B<%c, %x, %X> date+time, date, time
+B<%c, %x, %X> print date+time, date only, time only.
=item *
-B<%U, %W> week number of the current year with either the first Sunday or
-the first Monday determining the first week
+B<%U, %W> number of the week of the current year, with either the
+first Sunday (%U) or the first Monday (%W) determining the first week.
=item *
-B<%Z> time zone
+B<%Z> prints the time zone.
=back
+=item B<PRINT:>I<vname>B<:>I<CF><:>I<format>
+
+I<Deprecated. Use the new form of this command in new scripts.>
+The first form of this command is to be used with B<CDEF> I<vname>s.
+
=back
=head1 GRAPH
=over 4
-=item B<GPRINT>B<:>I<vname>B<:>I<CF>B<:>I<format>
+=item B<GPRINT>B<:>I<vname>B<:>I<format>
-I<Deprecated. Use the new form of this command in new scripts.>
-This is the same as C<PRINT> but now it is printed inside the graph.
+This is the same as C<PRINT>, but printed inside the graph.
-=item B<GPRINT>B<:>I<vname>B<:>I<format>
+=item B<GPRINT>B<:>I<vname>B<:>I<CF>B<:>I<format>
-This is the same as C<PRINT> but now it is printed inside the graph.
+I<Deprecated. Use the new form of this command in new scripts.>
+This is the same as C<PRINT>, but printed inside the graph.
=item B<COMMENT>B<:>I<text>
-Text is printed literally in the legend section of the graph
+Text is printed literally in the legend section of the graph. Note that in
+RRDtool 1.2 you have to escape colons in COMMENT text in the same way you
+have to escape them in B<*PRINT> commands by writing B<'\:'>.
=item B<HRULE>B<:>I<value>B<#>I<color> [ :I<legend> ]
-I<Deprecated. Use B<LINEx> in new scripts.>
+I<Deprecated. Use B<LINE> in new scripts.>
-=item B<VRULE>B<:>I<vname>B<#>I<color> [B<:>I<legend> ]
+=item B<VRULE>B<:>I<time>B<#>I<color> [B<:>I<legend> ]
Draw a vertical line at I<time>. Its color is composed from three
-hexadecimal numbers specifying the color components (00 is off, FF is
-maximum) red, green and blue. Optionally a legend box and string is
+hexadecimal numbers specifying the rgb color components (00 is off, FF is
+maximum) red, green and blue. Optionally, a legend box and string is
printed in the legend section. I<time> may be a number or a variable
from a B<VDEF>. It is an error to use I<vname>s from B<DEF> or B<CDEF> here.
-=item B<LINE>I<width>B<:>I<{vname or number}>B<#>I<color>[B<:>I<legend>]
-[ C<:STACK> ]
+=item B<LINE>[I<width>]B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
+
+Draw a line of the specified width onto the graph. I<width> can be a
+floating point number. If the color is not specified, the drawing is done
+'invisibly'. This is useful when stacking something else on top of this
+line. Also optional is the legend box and string which will be printed in
+the legend section if specified. The B<value> can be generated by B<DEF>,
+B<VDEF>, and B<CDEF>. If the optional B<STACK> modifier is used, this line
+is stacked on top of the previous element which can be a B<LINE> or an
+B<AREA>.
-Draw a line of the specified width into the graph. If the color
-is not specified, the drawing is done 'blind'. This is useful when
-stacking something else on top of this line. Also optional is the
-legend box and string which will be printed in the legend section
-if specified. The B<vname> can be generated by B<DEF>, B<VDEF> and
-B<CDEF>. If the optional B<STACK> modifier is used, this line is
-stacked on top of the previous element which can be a B<LINEx> or
-an B<AREA>
+When you do not specify a color, you cannot specify a legend. Should
+you want to use STACK, use the "LINEx:<value>::STACK" form.
-=item B<AREA>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>][B<:STACK>]
+=item B<AREA>B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
See B<LINE>, however the area between the x-axis and the line will
-also be filled.
+be filled.
=item B<TICK>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<fraction>[B<:>I<legend>]]
Using this command B<RRDtool> will graph the following elements
with the specified offset. For instance, you can specify an
-offset of S<( 7*24*60*60 = ) 604800 seconds> to "look back" one
-week. Make sure to notify the viewer you did so...
+offset of S<( 7*24*60*60 = ) 604'800 seconds> to "look back" one
+week. Make sure to tell the viewer of your graph you did this ...
As with the other graphing elements, you can specify a number or
a variable here.
=cut
-=item B<PART>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>]
-
-B<RRDtool> has now support for B<pie charts>. If you include the
-B<PART> command, the canvas is extended to make room for a chart
-The size of the canvas is determined by the lesser of
-L<width and height|rrdgraph/item_Size>.
-
-Pie parts will be concatenated, the first one will start at the
-top and parts will be created clockwise. The size of the part
-is defined by the value part of the L<VDEF|rrdgraph_data/VDEF>
-function. It should return a number between 0 and 100, being a
-percentage. Providing wrong input will produce undefined results.
+# This section describes the curruently defunct
+# PieChart code.
+#
+# =item B<PART>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>]
+#
+# B<RRDtool> has now support for B<pie charts>. If you include the
+# B<PART> command, the canvas is extended to make room for a chart.
+# The size of the canvas is determined by the lesser of
+# L<width and height|rrdgraph/item_Size>.
+#
+# Pie parts will be concatenated, the first one will start at the
+# top and parts will be created clockwise. The size of the part
+# is defined by the value part of the L<VDEF|rrdgraph_data/VDEF>
+# function. It should return a number between 0 and 100, being a
+# percentage. Providing wrong input will produce undefined results.
+#
+#
=pod
on top of the previous element. There must be something to stack
upon.
-An B<invisible> LINEx or AREA B<is> present and can be stacked upon.
+You can use an B<invisible> LINE or AREA to stacked upon.
An B<unknown> value makes the entire stack unknown from that moment on.
You don't know where to begin (the unknown value) and therefore do
=head2 Escaping the colon
-In a ':' in a I<legend> argument will mark the end of the legend. To
-enter a ':' into a legend, the colon must be escaped with a backslash '\:'.
-Beware, that many environments look for backslashes themselves, so it may
-be necessary to write two backslashes so that one is passed onto rrd_graph.
+A colon ':' in a I<legend> argument will mark the end of the
+legend. To enter a ':' as part of a legend, the colon must be escaped
+with a backslash '\:'. Beware that many environments process
+backslashes themselves, so it may be necessary to write two
+backslashes in order to one being passed onto rrd_graph.
=head2 String Formatting
-The text printed below the actual graph can be formated by appending special
-escaped characters at the end of a text. When ever such a character occurs,
+The text printed below the actual graph can be formatted by appending special
+escape characters at the end of a text. When ever such a character occurs,
all pending text is pushed onto the graph according to the character
specified.
Valid markers are: B<\j> for justified, B<\l> for left aligned, B<\r> for
-right aligned and B<\c> for centered. In the next section there is an
-example showing how to use centered formating.
+right aligned, and B<\c> for centered. In the next section there is an
+example showing how to use centered formatting.
Normally there are two space characters inserted between every two items
printed into the graph. The space following a string can be suppressed by
GPRINT:a:MAX:%lf%s\g
-A special case is COMMENT:B<\s> this inserts some additional vertical space
+A special case is COMMENT:B<\s> which inserts some additional vertical space
before placing the next row of legends.
-If you are using the proportional font in your graph, you can use tab characters
-or the sequence B<\t> to lin-up legend elements. Note that the tabs inserted are
-relative to the start of the current legend element!
+If you are using the proportional font in your graph, you can use tab
+characters or the sequence B<\t> to line-up legend elements. Note that
+the tabs inserted are relative to the start of the current legend
+element!
=head1 SEE ALSO
L<rrdgraph> gives an overview of how B<rrdtool graph> works.
-L<rrdgraph_data> describes B<DEF>,B<CDEF> and B<VDEF> in detail,
-L<rrdgraph_rpn> describes the B<RPN> language used in the B<?DEF> statements,
+L<rrdgraph_data> describes B<DEF>,B<CDEF> and B<VDEF> in detail.
+L<rrdgraph_rpn> describes the B<RPN> language used in the B<?DEF> statements.
L<rrdgraph_graph> page describes all of the graph and print functions.
Make sure to read L<rrdgraph_examples> for tipsE<amp>tricks.
projects / rrdtool.git / blobdiff