From: Thomas Sefzick <t.sefzick@fz...> - 2009-04-27 14:46:31
> Hey All
> New to gnuplot!!
> I want to use gnuplot to print data from a serial commport in realtime.
> What i have done so far is got a terminal program that can
> log to a file while at the same time gnuplot is reading from the file.
> What i would like though is not have to send the xAxis values each time
> from the
> commport to the file. My question is, is it possible to get gnuplot to
> take a colum
> of data from a file plot these values on the yaxis, for example colum1
> row1 is sample 1,
> therefore x should automtically be 1 and the value for y is the data. This
> is something
> like Excel when you grab a colum of data, it automatically creates an
plot 'datafile' using 1
> Also when i run the script to do this, i sort of loose control of gnuplot,
> it keeps
> redrawing the graph even if i have stopped writing to the file from the
> commport and
> i can't pause it or stop it. Is it possible to get gnuplot to stop once it
> has reached the end of the file?
do you reread the file every time the plot is updated?
if yes, the only way to stop gnuplot from reading it
is to delete or rename the file.
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