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Groups > comp.graphics.apps.gnuplot > #3767

Re: set link via in version 5.0 vs 5.2

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Thank you for the script and data files.
I have opened a tracking ticket on the project bug tracker:
   https://sourceforge.net/p/gnuplot/bugs/1973/

	Ethan


Klaus Dahlke wrote:

> On Thu, 05 Oct 2017 09:30:55 -0700, Ethan A Merritt wrote:
> 
>> Klaus Dahlke wrote:
>> 
>>> I use gnuplot mainly by calling it from a ruby on rails application,
>>> but the following behaviour difference is also observable just by using
>>> gnuplot from the command line:
>>> 
>>> I like to plot two datasets, one for axes x1 and y1 and the second one
>>> for x2 and y2. In Gnuplot 5.0 the following set of commends works fine:
>>> 
>>> set autoscale xfixmax set link x2 via x*0.319 inverse x/0.319
>>> 
>>> and plot has the expected outcome. The plot is then an rectangular
>>> where the x1 axes and x2 axes ends just at/on the y2 axis.
>> 
>> It is hard to say what the problem might be because you have not shown
>> the plot command itself.  What are you plotting?
>> 
> 
> I plot two files shown details of my running excercise. File 1
> (739hr.dat) has 2552 lines and contains 'distance, heart rate' pairs.
> The first and last lines are:
> 0,0
> 0,87
> 0,85
> 2.46,82
> 5.32642,80
> 8.19743,78
> 11.05585,78
> 13.90777,79
> 16.77938,82
> 19.69123,83
> 
> ...
> 
> 7990.85547,132
> 7994.46777,132
> 7997.87305,133
> 8001.5376,133
> 8005.17773,132
> 
> The second one contains the average pace for each ~500 m as pair of 'time
> since start, average pace'. Here the complete dataset (739pace.dat):
> 0, 353.448620152562
> 177, 318.720307895845
> 336, 301.830974654194
> 487, 322.322322322322
> 648, 318.79060068971
> 807, 320.921703077659
> 968, 308.095046314942
> 1121, 318.439645735894
> 1281, 319.34215516037
> 1441, 306.036724406929
> 1594, 320.763416932299
> 1754, 330.621568548872
> 1919, 314.687430657818
> 2075, 323.066555674476
> 2238, 322.051528244519
> 2399, 302.030203020302
> 2550, 273.972602739726
> 2552, 273.972602739726
> 
> both values are in seconds. The entry '336, 301.83' means: the 500 m
> starting at 5:36 after excercise begin I ran with an average pace of 5:01
> min/km.
> 
> 
> Here the plot commands:
> #!/usr/bin/gnuplot -persist
> #
> #
> #       G N U P L O T
> #       Version 5.0 patchlevel 6    last modified 2017-03-18
> #
> #       Copyright (C) 1986-1993, 1998, 2004, 2007-2017
> #       Thomas Williams, Colin Kelley and many others
> #
> #       gnuplot home:     http://www.gnuplot.info
> #       faq, bugs, etc:   type "help FAQ"
> #       immediate help:   type "help"  (plot window: hit 'h')
> # set terminal qt 0 font "Sans,9"
> # set output
> #    EOF
> set xdata
> set ydata
> set datafile separator ","
> set autoscale xfixmax
> set grid xtics ytics
> set xlabel 'Strecke [m]' font 'times, 12'
> set ylabel 'Puls [1/min]' font 'times, 12'
> set tics font 'arial,10'
> set xtics nomirror
> set ytics nomirror
> set x2data time
> set y2data time
> set timefmt '%s'
> set format x2 "%M"
> set format y2 "%M:%S"
> set x2tics
> set y2tics
> set x2label 'Zeit [min] (nicht exakt)' font 'times, 12'
> set y2label 'Pace [min/km]' font 'times, 12'
> set link x2 via x*0.319 inverse x/0.319
> plot "739hr.dat" using 1:2 with lines smooth cspline lc rgb 'blue' axes
> x1y1 title 'Puls', "739pace.dat" using 1:2 with steps lc rgb 'red' axes
> x2y2 title 'Pace'
> 
> The factor 0.319 is basically 2552/8005
> 
>>> After upgrade to version 5.2 plotting is aborted with 'x range is
>>> invalid'. When replacing 'set autoscale xfixmax' with e.g 'set xrange
>>> [0:7349]' the plot is produced fine, 'set xrange [0:*]' doesn't work.
>> 
>> It works fine here, but I am probably testing a different plot command.
>> Please show the entire series of commands that result in an error
>> message.
> 
> Here my output if I load the file working in v5.0 into v5.2 (Archlinux):
> 
> $ gnuplot
> 
>         G N U P L O T
>         Version 5.2 patchlevel 0    last modified 2017-09-01
> 
>         Copyright (C) 1986-1993, 1998, 2004, 2007-2017
>         Thomas Williams, Colin Kelley and many others
> 
>         gnuplot home:     http://www.gnuplot.info
>         faq, bugs, etc:   type "help FAQ"
>         immediate help:   type "help"  (plot window: hit 'h')
> 
> Terminal type is now 'qt'
> gnuplot> load '739.gp'
> 
> gnuplot> plot "739hr.dat" using 1:2 with lines smooth cspline lc rgb
> 'blue' axes x1y1 title 'Puls', "739pace.dat" using 1:2 with steps lc rgb
> 'red' axes x2y2 title 'Pace'
>                                                                                                                                                                           
> ^
>          "739.gp", line 36: x range is invalid
> 
> gnuplot> set xrange [0:*]
> gnuplot> plot "739hr.dat" using 1:2 with lines smooth cspline lc rgb
> 'blue' axes x1y1 title 'Puls', "739pace.dat" using 1:2 with steps lc rgb
> 'red' axes x2y2 title 'Pace'
>                                                                                                                                                                           
> ^
>          x range is invalid
> 
> gnuplot> set xrange [0:8005]
> gnuplot> plot "739hr.dat" using 1:2 with lines smooth cspline lc rgb
> 'blue' axes x1y1 title 'Puls', "739pace.dat" using 1:2 with steps lc rgb
> 'red' axes x2y2 title 'Pace'
> gnuplot>
> 
>>> 
>>> Nevertheless, would be happyif the behaviour could be reverted back to
>>> use 'set autoscale xfixmax'.
>> 
>> There was no intentional change in the effect of command "set autoscale
>> xfixmax".     If there is a bug that caused an unintentional change we
>> can try to fix it, but you will have to show an example of the bug so
>> that it can be reproduced.
>> 
>> Ethan
>> 
>> 
> Best regards,
> Klaus

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Thread

set link via in version 5.0 vs 5.2 Klaus Dahlke <kdahlke@gmx.de> - 2017-10-04 20:49 +0000
  Re: set link via in version 5.0 vs 5.2 Ethan A Merritt <EAMerritt@gmail.com> - 2017-10-05 09:30 -0700
    Re: set link via in version 5.0 vs 5.2 Klaus Dahlke <kdahlke@gmx.de> - 2017-10-05 21:36 +0000
      Re: set link via in version 5.0 vs 5.2 Ethan A Merritt <sfeam@users.sourceforge.net> - 2017-10-05 17:37 -0700

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