GetOptions(\%opt,
'color|c!',
'C' => sub { $opt{color} = 0 },
+ 'field|f=i',
'interval|t:i',
'trim|length|l=s' => sub {
my ($optname, $optval) = @_;
$SIG{INT} = 'IGNORE'; # continue after assumed eof
my (@lines, @values);
+my $anchor = $opt{field} ? qr/(?:\S*\h+){$opt{field}}\K/ : qr/^/;
while (readline) {
s/\r?\n\z//;
s/^\h*// unless $opt{unmodified};
- push @values, s/^ ( \h* -? [0-9]* \.? [0-9]+ |)/\n/x && $1;
+ push @values, s/$anchor ( \h* -? [0-9]* \.? [0-9]+ |)/\n/x && $1;
if (defined $opt{trim}) {
my $trimpos = abs $opt{trim};
if ($trimpos <= 1) {
=head1 DESCRIPTION
-Each line starting with a number is given a bar to visualise relative sizes.
+Visualizes relative sizes of values read from input (file(s) or STDIN).
+Contents are concatenated similar to I<cat>,
+but numbers are reformatted and a bar graph is appended to each line.
=head1 OPTIONS
Defaults on if output is a tty,
disabled otherwise such as when piped or redirected.
+=item -f, --field=<number>
+
+Compare values after a given number of whitespace separators.
+Unspecified or I<-f0> means values are at the start of each line.
+With I<-f1> the second word is taken instead.
+
=item -t, --interval[=<seconds>]
Interval time to output partial progress.
curl https://sdw.ecb.europa.eu/export.do \
-Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |
- awk -F, '{RS="\r\n"} /^[12]/{print $2,$1}' | graph
+ awk -F, '{RS="\r\n"} /^[12]/{print $1,$2}' | graph -f1
Total population history from the World Bank dataset (XML):
curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
- awk -F'<[^>]+>' 'BEGIN {RS="</wb:value>"} {print $4,$2}' | graph
+ sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | graph -f1
Movies per year from prepared JSON data: