Re: [Gnuplot-info] empty data sets

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

where is the warning
   warning: Skipping data file with no valid points
going, that gnuplot prints to stderr?
does it cause the http-server or the cgi-script not to
accept the plot?


stevecoh1 wrote:
> 
> I have a dynamic script, fired by cgi that prints a graph.  Data is
> dynamically supplied by the script in two plots.  It is possible that
> either or both of the two plots might contain no data.  I just realized
> that when one of the two plots is empty no graph was being emitted at
> all, even though the other plot had data.
> 
> The plot command I used was:
> plot "-" u 1:2 ti "Weekday" w impulses, "-" u 1:2 ti "Weekend" w impulses
>  
> e
> e
> 
> I expected to see the Weekday series and not the Weekend, but instead
> saw nothing.
> 
> 
> It was easy enough to fix this in the script with if logic, but
> arguably, shouldn't I expect gnuplot to plot something if I give it
> something even if one of the series is blank?
> 
> 
> 
> 
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