gnuplot-py-users Mailing List for Gnuplot.py

Hello,

is there any possibility to ensure that an output file will be created
immediately after calling the plot method?

My problem is the following:

     g = Gnuplot.Gnuplot(debug=1)
     g.xlabel('x')
     g.ylabel('y')
     g('set terminal postscript eps color solid "Helvetica" 24')
     g('set output "tmp.eps"')
     g.plot(X)

     p = os.popen('/usr/bin/convert tmp.eps png:-', 'r')
     img = Binary(p.read())
     p.close()

This EPS to PNG conversion is done for several reasons.  One of these
reasons are better fonts compared to direct PNG output.

Unfortunately it is not sure that the file tmp.eps exists at this time.
I have a randomly effect that it is missing if I go through a loop of
about 30 iterations (each creating different images).

I guess this has something to do with syncronisation and I wonder if I could
flush a certain buffer to ensure that the file is written.

Any hints?

      Andreas.

Hi Nate,

Yes, please use the code on CVS, that will do. You can search
in mailing list archives for discussion on this topic.

Best
-- leo

On Mon, 2 Dec 2002, Nate Gelbard wrote:

> Hello,
>
> I've written a python script that collects memory data from many
> test machines and graphs it over time.
>
> I have a problem that comes & goes where gnuplot is passed a list
> of /tmp/@files to plot (8 lines per graph), and it can't find the last
> file. Below is a log that illustrates the issue:
>
> I assume something is being cleaned up too quickly..
>
> any suggestions?

Hello,

I've written a python script that collects memory data from many
test machines and graphs it over time.

I have a problem that comes & goes where gnuplot is passed a list
of /tmp/@files to plot (8 lines per graph), and it can't find the last
file. Below is a log that illustrates the issue:

I assume something is being cleaned up too quickly..

any suggestions?

thanx
nate

gnuplot> set data style lines
gnuplot> set term png color
gnuplot> set output
"/home/gelbardn/public_html/vegaDuration/speedy-mem-199.png"
gnuplot> set title "Time vs Memory"
gnuplot> set xlabel "Time \(10min intervals\)"
gnuplot> set ylabel "Kilobytes"
gnuplot> plot '/tmp/@32215.0' title "interbase", '/tmp/@32215.1' title
"rmid", '/tmp/@32215.2' title "txn", '/tmp/@32215.3' title "javaspace",
'/tmp/@32215.4' title "outrigger", '/tmp/@32215.5' title "lookup",
'/tmp/@32215.6' title "space", '/tmp/@32215.7' title "tomcat"

gnuplot> plot '/tmp/@32215.0' title "interbase", '/tmp/@32215.1' title
"rmid", '/tmp/@32215.2' title "txn", '/tmp/@32215.3' title "javaspace",
'/tmp/@32215.4' title "outrigger", '/tmp/@32215.5' title "lookup",
'/tmp/@32215.6' title "space", '/tmp/@32215.7' title "tomcat"
 
^
         can't read data file "/tmp/@32215.7"
         line 0: (No such file or directory)

gnuplot> set data style lines
gnuplot> set term png color
gnuplot> set output
"/home/gelbardn/public_html/vegaDuration/goofy-mem-199.png"
gnuplot> set title "Time vs Memory"
gnuplot> set xlabel "Time \(10min intervals\)"
gnuplot> set ylabel "Kilobytes"
gnuplot> plot '/tmp/@32215.8' title "interbase", '/tmp/@32215.9' title
"rmid", '/tmp/@32215.10' title "txn", '/tmp/@32215.11' title "javaspace",
'/tmp/@32215.12' title "outrigger", '/tmp/@32215.13' title "lookup",
'/tmp/@32215.14' title "space", '/tmp/@32215.15' title "tomcat"
gnuplot> set data style lines
gnuplot> set term png color
gnuplot> set output
"/home/gelbardn/public_html/vegaDuration/plucky-mem-199.png"
gnuplot> set title "Time vs Memory"
gnuplot> set xlabel "Time \(10min intervals\)"
gnuplot> set ylabel "Kilobytes"
gnuplot> plot '/tmp/@32215.16' title "interbase", '/tmp/@32215.17' title
"rmid", '/tmp/@32215.18' title "txn", '/tmp/@32215.19' title "javaspace",
'/tmp/@32215.20' title "outrigger", '/tmp/@32215.21' title "lookup",
'/tmp/@32215.22' title "space", '/tmp/@32215.23' title "tomcat"
gnuplot> set data style lines
gnuplot> set term png color
gnuplot> set output
"/home/gelbardn/public_html/vegaDuration/blackhole-mem-199.png"
gnuplot> set title "Time vs Memory"
gnuplot> set xlabel "Time \(10min intervals\)"
gnuplot> set ylabel "Kilobytes"
gnuplot> plot '/tmp/@32215.24' title "interbase", '/tmp/@32215.25' title
"rmid", '/tmp/@32215.26' title "txn", '/tmp/@32215.27' title "javaspace",
'/tmp/@32215.28' title "outrigger", '/tmp/@32215.29' title "lookup",
'/tmp/@32215.30' title "space", '/tmp/@32215.31' title "tomcat"

gnuplot> plot '/tmp/@32215.24' title "interbase", '/tmp/@32215.25' title
"rmid", '/tmp/@32215.26' title "txn", '/tmp/@32215.27' title "javaspace",
'/tmp/@32215.28' title "outrigger", '/tmp/@32215.29' title "lookup",
'/tmp/@32215.30' title "space", '/tmp/@32215.31' title "tomcat"
 
^
         can't read data file "/tmp/@32215.30"
         line 0: (No such file or directory)

gnuplot> set data style lines
gnuplot> set term png color
gnuplot> set output
"/home/gelbardn/public_html/vegaDuration/wormhole-mem-199.png"
gnuplot> set title "Time vs Memory"
gnuplot> set xlabel "Time \(10min intervals\)"
gnuplot> set ylabel "Kilobytes"
gnuplot> plot '/tmp/@32215.32' title "interbase", '/tmp/@32215.33' title
"rmid", '/tmp/@32215.34' title "txn", '/tmp/@32215.35' title "javaspace",
'/tmp/@32215.36' title "outrigger", '/tmp/@32215.37' title "lookup",
'/tmp/@32215.38' title "space", '/tmp/@32215.39' title "tomcat"

gnuplot> plot '/tmp/@32215.32' title "interbase", '/tmp/@32215.33' title
"rmid", '/tmp/@32215.34' title "txn", '/tmp/@32215.35' title "javaspace",
'/tmp/@32215.36' title "outrigger", '/tmp/@32215.37' title "lookup",
'/tmp/@32215.38' title "space", '/tmp/@32215.39' title "tomcat"
 
^
         can't read data file "/tmp/@32215.39"
         line 0: (No such file or directory)