gnuplot-info

[Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Boniforti F. <fl...@pi...>]

Hello everybody.

I'm pretty new at gnuplot, but I already achieved my first result...
(see: http://yfrog.com/j8polti200911p )

Now, what I'm doing is to grab every night the total amount of traffic
being sent/received via SSH between my server and a couple of different
remote hosts. I achieved this via iptables, but I don't want to bother
you all... The result of this data collection is like:

2009-11-16      4296994550      155016994
2009-11-17      6458167774      228657538
2009-11-18      8776045950      424622670

The columns represent date, bytes received, bytes sent.

I now would like to schedule a daily update of the graph you can see at
the above URL, but also:

A) the graph should be generated *new* when the actual month is over
(I'd like to have different PNGs for each month);
B) it should be schedulable, but I don't know how to put or pass
variables to the plot script

Here the plot script I'm using:

set term png
set output 'polti-2009-11.png'
set timestamp 'Ultimo aggiornamento: %d.%m.%Y' top
set xdata time
set timefmt '%Y-%m-%d'
set xrange ['2009-11-01':'2009-11-30']
set xlabel 'Data'
set format x '%d.%m'
set ylabel 'Bytes'
set format y '%.0s %cb'
set title 'Traffico'
set key off
set boxwidth 0.8 relative
set style fill solid 1.0
plot '2009-11-213.200.254.141.dat' using 1:2 with boxes fs solid,\
'2009-11-213.200.254.141.dat' using 1:3 with boxes fs solid

Any help will be appreciated, thanks in advance!

Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

Re: [Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Hans-Bernhard B. <HBB...@t-...>]

Boniforti Flavio wrote:

> A) the graph should be generated *new* when the actual month is over
> (I'd like to have different PNGs for each month);

That's mainly between you and your data generation scripts to handle.

> B) it should be schedulable, but I don't know how to put or pass
> variables to the plot script

There are several approaches.  The basic choice is between parametrizing 
  a canned gnuplot script from the outside using environment variables 
(`echo $VARIABLE` style), and modifying the script on the fly (HERE 
script or piping individual commands from another scripting language to 
gnuplot).

Re: [Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Boniforti F. <fl...@pi...>]

Hallo Hans-Bernhard,

> > A) the graph should be generated *new* when the actual 
> month is over 
> > (I'd like to have different PNGs for each month);
> 
> That's mainly between you and your data generation scripts to handle.

OK, I'll go for it after I have my gnuplot script working...

> > B) it should be schedulable, but I don't know how to put or pass 
> > variables to the plot script
> 
> There are several approaches.  The basic choice is between 
> parametrizing
>   a canned gnuplot script from the outside using environment 
> variables (`echo $VARIABLE` style), and modifying the script 
> on the fly (HERE script or piping individual commands from 
> another scripting language to gnuplot).

Well, actually I have played a bit with setting variables inside gnuplot and trying to concatenate them.

I succeeded in concatenating *string* variables:

gnuplot> VAR='polti'.'-'.`date +%Y`
gnuplot> print VAR
polti-2009
gnuplot> VAR=VAR.'-'.`date +%m`
gnuplot> print VAR
polti-2009-11

I think playing with these sort of variable definitions, also will lead me to success... What do you think of this?

Thanks,
Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi...