Re: [Gnuplot-info] [gnuplot] Loop to plot max value

[Ethan A M. <EAM...@gm...>]

On Sunday, 07 December 2014 01:18:56 PM Jacob Gerlach wrote:
> Hi list,
> 
> I have several datafiles, which I'd like to plot together on one plot as
> smooth lines, but I'd also like to highlight each maximum
> 
> With one file, I'm able to do
> 
>     plot 'file' smooth csplines
>     stats 'file'
>     replot file every::STATS_index_max::STATS_index_max notitle
> 
> And get what I want.
> I tried expanding this with loops:
> 
> filenames = "one two three four"
> 
> plot for [file in filenames] file.".txt" \
>      smooth csplines
> 
> do for [n=1:4] {
> file=word(filenames,n).'.txt'
> stats file
> replot file every ::STATS_index_max::STATS_index_max notitle
> }
> 
> This plots the csplines fine, but when replotting, I get four occurrences of
> warning: Skipping unreadable file "four"
> 
> It seems this is some sort of name conflict by reusing the variable files;
> I was able to solve this by using a different variable, but I'd like to
> understand what happened.
> 
> Even after changing the file name, I don't get four separate maxima.
> Instead, I get the maximum from "four" plotted four times.
> 
> Is it possible to do this with loops or do I need to write one big plotting
> command to do it all at once?

files = "one two three four"

do for [name in files] {
	stats name.'.txt' using 1 prefix name
}

plot for [name in files] name.'.txt' every :: name."_index_max" :: name."_index_max", \
     for [name in files] name.'.txt'


But probably I would do it differently.  Something like

set for [name in files] arrow from name."index_max", 0 to name."_index_max", name."_max"
plot for [name in filex] name.'.txt' using 1


	Ethan