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Nicer sample plots in the docs

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Dima Kogan 2024-02-19 20:43:33 -08:00
parent 96ac271cda
commit 2db7f980b5
1 changed files with 97 additions and 41 deletions
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@ -1420,56 +1420,112 @@ Simple plotting of piped data:
10 25
$ seq 5 | awk '{print 2*$1, $1*$1}' |
feedgnuplot --lines --points --legend 0 "data 0" --title "Test plot" --y2 1
--unset grid --terminal 'dumb 80,40' --exit
feedgnuplot \
--lines \
--points \
--title "Test plot" \
--y2 1 \
--unset key \
--unset grid \
--terminal 'dumb 80,40' \
--exit
Test plot
10 +-----------------------------------------------------------------+ 25
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2 +-----------------------------------------------------------------+ 0
1 1.5 2 2.5 3 3.5 4 4.5 5
Here we asked for ASCII plotting, which is useful for documentation.
Simple real-time plotting example: plot how much data is received on the wlan0
network interface in bytes/second (uses bash, awk and Linux):
network interface in bytes/second. This plot updates at 1Hz, and shows the last
10sec of history. The plot shown here is the final state of a sample run
$ while true; do sleep 1; cat /proc/net/dev; done |
gawk '/wlan0/ {if(b) {print $2-b; fflush()} b=$2}' |
feedgnuplot --lines --stream --xlen 10 --ylabel 'Bytes/sec' --xlabel seconds
$ while true; do
sleep 1;
cat /proc/net/dev;
done \
| gawk '/wlan0/ {if(b) {print $2-b; N++; fflush()} b=$2} N==15 {exit}' \
| feedgnuplot \
--lines \
--title "wlan0 throughput" \
--stream \
--xlen 10 \
--ylabel 'Bytes/sec' \
--xlabel seconds \
--unset key \
--unset grid \
--terminal 'dumb 80,40' \
--exit
wlan0 throughput
300000 +---------------------------------------------------------------+
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250000 |-+ * +-|
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200000 |-+ * * +-|
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150000 |-+ * *+-|
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100000 |-+ * *-|
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0 +---------------------------------------------------------------+
6 8 10 12 14
seconds
=head1 DESCRIPTION