version bump

Changes

@@ -1,3 +1,16 @@
+feedgnuplot (1.37)
+
+  * At the end of a streaming plot, include the last chunk of data
+  * Added --equation to the completions
+
+ -- Dima Kogan <dima@secretsauce.net>  Fri, 01 Jan 2016 08:09:43 -0800
+
+feedgnuplot (1.36)
+
+  * Added --equation to plot symbolic equations
+
+ -- Dima Kogan <dima@secretsauce.net>  Fri, 13 Nov 2015 11:08:26 -0800
+
 feedgnuplot (1.35)
 
   * replaced a 'say' with 'print'. Should work better with ancient perls

bin/feedgnuplot

@@ -14,7 +14,7 @@ use Text::ParseWords; # for shellwords
 use Pod::Usage;
 use Time::Piece;
 
-my $VERSION = 1.35;
+my $VERSION = 1.37;
 
 my %options;
 interpretCommandline();
@@ -89,6 +89,7 @@ sub interpretCommandline
   $options{extracmds}  = [];
   $options{set}        = [];
   $options{unset}      = [];
+  $options{equation}   = [];
 
   $options{curvestyleall} = '';
   $options{styleall}      = '';
@@ -102,6 +103,7 @@ sub interpretCommandline
              'zmin=f', 'zmax=f', 'y2=s@',
              'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
              'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
+             'equation=s@',
              'histogram=s@', 'binwidth=f', 'histstyle=s',
              'terminal=s',
              'rangesize=s{2}', 'rangesizeall=i', 'extraValuesPerPoint=i',
@@ -550,7 +552,7 @@ sub mainThread
       print(PIPE "set view equal xy\n");
     }
 
-# For the specified values, set the legend entries to 'title "blah blah"'
+    # For the specified values, set the legend entries to 'title "blah blah"'
     if(@{$options{legend}})
     {
       # @{$options{legend}} is a list where consecutive pairs are (curveID,
@@ -565,7 +567,7 @@ sub mainThread
       }
     }
 
-# add the extra curve options
+    # add the extra curve options
     if(@{$options{curvestyle}})
     {
       # @{$options{curvestyle}} is a list where consecutive pairs are (curveID,
@@ -580,22 +582,22 @@ sub mainThread
       }
     }
 
-# For the values requested to be printed on the y2 axis, set that
+    # For the values requested to be printed on the y2 axis, set that
     addCurveOption($_, 'axes x1y2') foreach (@{$options{y2}});
 
-# timefmt
+    # timefmt
     if( $options{timefmt} )
     {
       print(PIPE "set timefmt '$options{timefmt}'\n");
       print(PIPE "set xdata time\n");
     }
 
-# add the extra global options
+    # add the extra global options
     print(PIPE "$_\n")       foreach (@{$options{extracmds}});
     print(PIPE "set $_\n")   foreach (@{$options{set}});
     print(PIPE "unset $_\n") foreach (@{$options{unset}});
 
-# set up histograms
+    # set up histograms
     $options{binwidth} ||= 1;   # if no binwidth given, set it to 1
     print PIPE
       "set boxwidth $options{binwidth}\n" .
@@ -603,7 +605,7 @@ sub mainThread
 
     setCurveAsHistogram( $_ ) foreach (@{$options{histogram}});
 
-# set all the axis ranges
+    # set all the axis ranges
     # If a bound isn't given I want to set it to the empty string, so I can communicate it simply to
     # gnuplot
     print PIPE "set xtics\n";
@@ -747,7 +749,7 @@ sub mainThread
     }
 
     # finished reading in all. Plot what we have
-    plotStoredData() unless $options{stream};
+    plotStoredData() unless $options{stream} && $options{exit};
 
     if ( defined $options{hardcopy})
     {
@@ -818,7 +820,9 @@ sub plotStoredData
   my @nonemptyCurves = grep { $_->{datastring} } @curves;
   my @extraopts = map {$_->{options}} @nonemptyCurves;
 
-  my $body = join(', ' , map({ "'-' $_" } @extraopts) );
+  my $body = join('', map { "$_," } @{$options{equation}});
+  $body .= join(', ' , map({ "'-' $_" } @extraopts) );
+
   if($options{'3d'}) { print PIPE "splot $body\n"; }
   else               { print PIPE  "plot $body\n"; }
 
@@ -1537,12 +1541,17 @@ in the plot. Defaults to 1.0 if not given.
 
 C<--histstyle style>
 
-Normally, histograms are generated with the 'smooth freq' gnuplot style.
-C<--histstyle> can be used to select different 'smooth' settings. Allowed are
-'unique', 'cumulative' and 'cnormal'. 'unique' indicates whether a bin has at
-least one item in it: instead of counting the items, it'll always report 0 or 1.
-'cumulative' is the integral of the "normal" histogram. 'cnormal' is like
-'cumulative', but rescaled to end up at 1.0.
+Normally, histograms are generated with the 'smooth frequency' gnuplot style.
+C<--histstyle> can be used to select different C<smooth> settings (see the
+gnuplot C<help smooth> page for more info). Allowed values are 'frequency' (the
+default), 'unique', 'cumulative' and 'cnormal'. 'unique' indicates whether a bin
+has at least one item in it: instead of counting the items, it'll always report
+0 or 1. 'cumulative' is the integral of the 'frequency' histogram. 'cnormal' is
+like 'cumulative', but rescaled to end up at 1.0. Note that there's no
+normalized 'frequency' option because gnuplot does not provide one.
+
+
+C<help smooth>
 
 =item
 
@@ -1610,6 +1619,34 @@ times.
 
 =item
 
+C<--equation xxx>
+
+Gnuplot can plot both data and symbolic equations. C<feedgnuplot> generally
+plots data, but with this option can plot symbolic equations I<also>. This is
+generally intended to augment data plots, since for equation-only plots you
+don't need C<feedgnuplot>. C<--equation> can be passed multiple times for
+multiple equations. The given strings are passed to gnuplot directly without any
+thing added or removed, so styling and such should be applied in the string. A
+basic example:
+
+ seq 100 | awk '{print $1/10, $1/100}' |
+   feedgnuplot --with 'lines lw 3' --domain --ymax 1
+               --equation 'sin(x)/x' --equation 'cos(x)/x with lines lw 4'
+
+Here I plot the incoming data (points along a line) with the given style (a line
+with thickness 3), I<and> I plot two damped sinusoids on the same plot. The
+sinusoids are not affected by C<feedgnuplot> styling, so their styles are set
+separately, as in this example. More complicated example:
+
+ seq 360 | perl -nE '$th=$_/360 * 3.14*2; $c=cos($th); $s=sin($th); say "$c $s"' |
+   feedgnuplot --domain --square
+               --set parametric --set "trange [0:2*3.14]" --equation "sin(t),cos(t)"
+
+Here the data I generate is points along the unit circle. I plot these as
+points, and I I<also> plot a true circle as a parametric equation.
+
+=item
+
 C<--square>
 
 Plot data with aspect ratio 1. For 3D plots, this controls the aspect ratio for

completions/bash/feedgnuplot

@@ -20,6 +20,7 @@ complete -W               \
     --extracmds           \
     --set                 \
     --unset               \
+    --equation            \
     --geometry            \
     --hardcopy            \
     --help                \

completions/zsh/_feedgnuplot

@@ -32,6 +32,7 @@ _arguments -S
     '*--extracmds[Additional gnuplot commands]:command'                           \
     '*--set[Additional 'set' gnuplot commands]:set-option'                        \
     '*--unset[Additional 'unset' gnuplot commands]:unset-option'                  \
+    '*--equation[Raw symbolic equation]:equation'                                 \
     '--square[Plot data with square aspect ratio]'                                \
     '--square_xy[For 3D plots, set square aspect ratio for ONLY the x,y axes]'    \
     '--hardcopy[Plot to a file]:filename'                                         \