new trunk based on current 1.2

[rrdtool-all.git] / program / examples / minmax.pl.in

diff --git a/program/examples/minmax.pl.in b/program/examples/minmax.pl.in
new file mode 100755 (executable)
index 0000000..3fd0e65
--- /dev/null
+++ b/program/examples/minmax.pl.in
@@ -0,0 +1,52 @@
+#! @PERL@
+
+use lib qw( @prefix@/lib/perl );
+
+use RRDs;
+my $start=time;
+my $rrd="randome.rrd";
+my $name = $0;
+$name =~ s/.*\///g;
+$name =~ s/\.pl.*//g;
+
+RRDs::create ($rrd, "--start",$start-1, "--step",300,
+             "DS:a:GAUGE:600:U:U",
+             "RRA:AVERAGE:0.5:1:300",
+             "RRA:MIN:0.5:12:300",
+             "RRA:MAX:0.5:12:300",
+);
+my $ERROR = RRDs::error;
+die "$0: unable to create `$rrd': $ERROR\n" if $ERROR;
+
+# dropt some data into the rrd
+my $t;
+for ($t=$start; $t<$start+300*300; $t+=300){
+  RRDs::update $rrd, "$t:".(sin($t/3000)*50+50);
+  if ($ERROR = RRDs::error) {
+    die "$0: unable to update `$rrd': $ERROR\n";
+  }
+}
+
+RRDs::graph "$name.png",
+  "--title", uc($name)." Demo", 
+  "--start", "now",
+  "--end", "start+1d",
+  "--lower-limit=0",
+  "--interlace", 
+  "--imgformat","PNG",
+  "--width=450",
+  "DEF:a=$rrd:a:AVERAGE",
+  "DEF:b=$rrd:a:MIN",
+  "DEF:c=$rrd:a:MAX",
+  "AREA:a#00b6e4:real",
+  "LINE1:b#0022e9:min",
+  "LINE1:c#00ee22:max",
+;
+
+if ($ERROR = RRDs::error) {
+  die "ERROR: $ERROR\n";
+};
+
+
+print "This script has created $name.png in the current directory\n";
+print "This demonstrates the use of MIN and MAX archives\n";