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From: Federico M. <fed...@gm...> - 2013-08-26 16:59:30
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Hi,
I am using gnuplot 4.4 patchlevel 4 (compied via homebrew) on Mac OS X
10.7.5 (GCC 4.2.1).
The following snippet should produce a series of points, all with
their errobars. However, this is the output that it produces instead:
* http://screencast.com/t/4m2ZkEgE
Am I missing something?
Thanks,
-F
reset
set timefmt "%H:%M:%S"
set ydata time
plot "-" u 1:2:3 w yerrorbars t ''
1 00:02:16 00:00:52
2 00:02:14 00:02:00
3 00:02:01 2
4 00:01:58 1.1
5 00:01:45 2.3
6 00:01:32 00:01:01
7 00:01:32 1.5
8 00:01:22 2
9 00:01:17 3
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From: Hans-Bernhard B. <HBB...@t-...> - 2013-08-26 21:15:08
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On 26.08.2013 18:58, Federico Maggi wrote: > Hi, > > I am using gnuplot 4.4 patchlevel 4 (compied via homebrew) on Mac OS X > 10.7.5 (GCC 4.2.1). Hmmm... if you're compiling your own gnuplot, why would you pick such an outdated version? > The following snippet should produce a series of points, all with > their errobars. Should it, now? How do you figure that column three of these two data records > 2 00:02:14 00:02:00 > 3 00:02:01 2 would both parse successfully, with the same input specification? |
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From: Federico M. <fed...@gm...> - 2013-08-27 09:24:18
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Marek, Hans, On Mon, Aug 26, 2013 at 11:15 PM, Hans-Bernhard Bröker <HBB...@t-...> wrote: >> I am using gnuplot 4.4 patchlevel 4 (compied via homebrew) on Mac OS X >> 10.7.5 (GCC 4.2.1). > > Hmmm... if you're compiling your own gnuplot, why would you pick such an > outdated version? I've upgraded to 4.6: the remainder of this email refers to tests conducted with 4.6 patchlevel 3. On Mon, Aug 26, 2013 at 8:01 PM, Marek W. Gutowski <gu...@if...> wrote: > Looks like you error column (3) is not always in correct (time) format. > Otherwise the plot is as expected, I don't see anything wrong with it. that was my point: 1) this script shows *no* errobars, whereas it should: # code: https://gist.github.com/4dfa75d1eeb7f4e5b54f # screenshot: http://screencast.com/t/jUY84naoxltV reset set timefmt "%H:%M:%S" set ydata time plot "-" u 1:2:3 w yerrorbars t '' 1 00:02:16 00:00:52 2 00:02:14 00:02:00 3 00:02:01 00:00:52 4 00:01:58 00:00:52 5 00:01:45 00:00:52 6 00:01:32 00:01:01 7 00:01:32 00:00:52 8 00:01:22 00:00:52 9 00:01:17 00:00:52 2) this script shows errobars correctly, as expected: # code: https://gist.github.com/c15f8ddc754f330acda7 # screenshot: http://screencast.com/t/VycQZFvRrlU reset plot "-" u 1:2:3 w yerrorbars t 'Script 2' 1 16 2 2 14 0 3 01 2 4 58 2 5 45 2 6 32 1 7 32 2 8 22 2 9 17 2 3) this script (correctly) shows the errorbars if these are specified as plain integers, whereas it does not shows any errorbars if these are specified as time values. Why? # code: https://gist.github.com/d52c622c19c2103792d4 # screenshot: http://screencast.com/t/cPucckjITl reset set timefmt "%H:%M:%S" set ydata time plot "-" u 1:2:3 w yerrorbars t 'Script 3' 1 00:02:16 00:00:52 2 00:02:14 00:02:00 3 00:02:01 2 4 00:01:58 1.1 5 00:01:45 2.3 6 00:01:32 00:01:01 7 00:01:32 1.5 8 00:01:22 2 9 00:01:17 3 > Why the last character in your plot command is "t"? it's the (empty) title specification. -F |
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From: thse <t.s...@fz...> - 2013-08-27 10:38:15
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the y-values are interpreted according to what has been set in 'set timefmt', the delta-y-values not. the easiest way is to give the delta-y-data in seconds: 1 00:02:16 52 2 00:02:14 120 3 00:02:01 52 4 00:01:58 52 5 00:01:45 52 6 00:01:32 61 7 00:01:32 52 8 00:01:22 52 9 00:01:17 52 -- View this message in context: http://gnuplot.10905.n7.nabble.com/Errorbars-not-showing-if-specified-as-time-date-data-tp17617p17623.html Sent from the Gnuplot - User mailing list archive at Nabble.com. |
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From: Federico M. <fed...@gm...> - 2013-08-27 11:04:29
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Thanks. -F On Tue, Aug 27, 2013 at 1:02 PM, Marek W. Gutowski <gu...@if...> wrote: > Aha, now I see the problem clearly. > Gnuplot doesn't recognize the third column as being written in current > timefmt, > as declared for ydata. Instead it understands it as containing seconds > (not necessarily the integer!). Therefore parsing string like "00:00:52" > produces > exactly zero (the tail of this string, i.e. ":00:52" is not interpreted as > it is not a valid > number). Unfortunately, a command like > set yerror time > seems not implemented. Of course, it would be natural to expect the same > format > for ydata and yerror(bars), and, consequently, for xdata and xerror(bars) - > but this > is evidently not the case. Overlooked? Maybe, but It would be a headache > to calculate yerrorbars as a combination of two or more columns, written in > mixed > formats, some of them numeric and others as time. Sooner or later somebody > would try this ... > This is probably why the trick > plot [0:10] "-" u 1:2:($2-$3):($2+$3) with errorbars > doesn't work either. > > All that remains is to reformat your input, either "on the fly" (I don't > know how > but it's possible) or outside gnuplot, to effectively have third column in > numeric > format, more precisely in seconds. > > Marek > > > Federico Maggi wrote: >> >> Marek, Hans, >> >> On Mon, Aug 26, 2013 at 11:15 PM, Hans-Bernhard Bröker >> <HBB...@t-...> wrote: >> >>>> I am using gnuplot 4.4 patchlevel 4 (compied via homebrew) on Mac OS X >>>> 10.7.5 (GCC 4.2.1). >>> >>> >>> Hmmm... if you're compiling your own gnuplot, why would you pick such an >>> outdated version? >> >> >> I've upgraded to 4.6: the remainder of this email refers to tests >> conducted with 4.6 patchlevel 3. >> >> On Mon, Aug 26, 2013 at 8:01 PM, Marek W. Gutowski<gu...@if...> >> wrote: >>> >>> Looks like you error column (3) is not always in correct (time) format. >>> Otherwise the plot is as expected, I don't see anything wrong with it. >> >> >> that was my point: >> >> 1) this script shows *no* errobars, whereas it should: >> >> # code: https://gist.github.com/4dfa75d1eeb7f4e5b54f >> # screenshot: http://screencast.com/t/jUY84naoxltV >> reset >> set timefmt "%H:%M:%S" >> set ydata time >> plot "-" u 1:2:3 w yerrorbars t '' >> 1 00:02:16 00:00:52 >> 2 00:02:14 00:02:00 >> 3 00:02:01 00:00:52 >> 4 00:01:58 00:00:52 >> 5 00:01:45 00:00:52 >> 6 00:01:32 00:01:01 >> 7 00:01:32 00:00:52 >> 8 00:01:22 00:00:52 >> 9 00:01:17 00:00:52 >> >> >> 2) this script shows errobars correctly, as expected: >> >> # code: https://gist.github.com/c15f8ddc754f330acda7 >> # screenshot: http://screencast.com/t/VycQZFvRrlU >> reset >> plot "-" u 1:2:3 w yerrorbars t 'Script 2' >> 1 16 2 >> 2 14 0 >> 3 01 2 >> 4 58 2 >> 5 45 2 >> 6 32 1 >> 7 32 2 >> 8 22 2 >> 9 17 2 >> >> >> 3) this script (correctly) shows the errorbars if these are specified >> as plain integers, whereas it does not shows any errorbars if these >> are specified as time values. Why? >> >> # code: https://gist.github.com/d52c622c19c2103792d4 >> # screenshot: http://screencast.com/t/cPucckjITl >> >> reset >> set timefmt "%H:%M:%S" >> set ydata time >> plot "-" u 1:2:3 w yerrorbars t 'Script 3' >> 1 00:02:16 00:00:52 >> 2 00:02:14 00:02:00 >> 3 00:02:01 2 >> 4 00:01:58 1.1 >> 5 00:01:45 2.3 >> 6 00:01:32 00:01:01 >> 7 00:01:32 1.5 >> 8 00:01:22 2 >> 9 00:01:17 3 >> >>> Why the last character in your plot command is "t"? >> >> >> it's the (empty) title specification. >> >> -F >> >> >> ------------------------------------------------------------------------------ >> Introducing Performance Central, a new site from SourceForge and >> AppDynamics. Performance Central is your source for news, insights, >> analysis and resources for efficient Application Performance Management. >> Visit us today! >> >> http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk >> _______________________________________________ >> gnuplot-info mailing list >> gnu...@li... >> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> > > > -- > Marek W. Gutowski > Institute of Physics PAS, ON-3.2, Al. Lotnikow 32/46 > 02-668 Warszawa, Poland, tel. +48-22-228436601 ext. 3122 > == To talk or not to talk? Yes, talk, plain ASCII please == > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- -Fede |
