a new random number needed for demo2.html

1 files changed, 25 insertions, 1 deletions

diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh
index aa1005d11a..7e07ccf47f 100755
--- a/charts.d/example.chart.sh
+++ b/charts.d/example.chart.sh
@@ -24,13 +24,19 @@ CHART example.random '' "Random Numbers Stacked Chart" "% of random numbers" ran
 DIMENSION random1 '' percentage-of-absolute-row 1 1
 DIMENSION random2 '' percentage-of-absolute-row 1 1
 DIMENSION random3 '' percentage-of-absolute-row 1 1
+CHART example.random2 '' "A random number" "random number" random random area 5001 $example_update_every
+DIMENSION random '' absolute 1 1
 EOF
 
 	return 0
 }
 
 # _update is called continiously, to collect the values
+example_last=0
+example_count=0
 example_update() {
+	local value1 value2 value3 value4 mode
+
 	# the first argument to this function is the microseconds since last update
 	# pass this parameter to the BEGIN statement (see bellow).
 
@@ -41,6 +47,21 @@ example_update() {
 	value1=$RANDOM
 	value2=$RANDOM
 	value3=$RANDOM
+	value4=$[8192 + (RANDOM * 16383 / 32767) ]
+
+	if [ $example_count -gt 0 ]
+		then
+		example_count=$[example_count - 1]
+
+		[ $example_last -gt 16383 ] && value4=$[example_last + (RANDOM * ( (32767 - example_last) / 2) / 32767)]
+		[ $example_last -le 16383 ] && value4=$[example_last - (RANDOM * (example_last / 2) / 32767)]
+	else
+		example_count=$[1 + (RANDOM * 5 / 32767) ]
+
+		[ $example_last -gt 16383 -a $value4 -gt 16383 ] && value4=$[value4 - 16383]
+		[ $example_last -le 16383 -a $value4 -lt 16383 ] && value4=$[value4 + 16383]
+	fi
+	example_last=$value4
 
 	# write the result of the work.
 	cat <<VALUESEOF
@@ -49,8 +70,11 @@ SET random1 = $value1
 SET random2 = $value2
 SET random3 = $value3
 END
+BEGIN example.random2 $1
+SET random = $value4
+END
 VALUESEOF
+	# echo >&2 "example_count = $example_count value = $value4"
 
 	return 0
 }
-