Re: [Gnuplot-info] column operation with time data

[Thomas S. <t.s...@fz...>]

columns with time data need a special read-in function when
the dates are to be modified:
plot "blabla.dat" u (timecolumn(2)+timecolumn(4))/2:($6+$8)/2


agoniabogar wrote:
> 
> Dear Plotters,
> 
> I hope you can help me, I have two diagrams that I would like to match and
> generate the average of both the time and the value data.
> ...
> plot "blabla.dat" u ($2+$4)/2:($6+$8)/2
> ...
> This would be the simplest method to plot the average values both in the x
> and y axis. But I have elapsed time in the x axis and it seems that the
> program does not want to execute the simple column operation in the
> command (regarding the time, $2 and $4 columns). The output says " empty
> xrange. . ."
>  I used the set timefmt "%H:%M:%S" and the set xdata time commands prior
> to the plot.
> 
> Many thanks in advance, 
> 
> Agoniabogar
> 
> 
> 

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