Gnuplot With Y Error Bars
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by the various errorbar styles. In the default situation, gnuplot expects to see three, four, or six numbers on each line gnuplot error bars style of the data file -- either (x, y, ydelta), (x, y, gnuplot error bars histogram ylow, yhigh), (x, y, xdelta), (x, y, xlow, xhigh), (x, y, xdelta, ydelta), or (x, y, xlow, gnuplot error bars standard deviation xhigh, ylow, yhigh). The x coordinate must be specified. The order of the numbers must be exactly as given above, though the using qualifier can manipulate the order and set bars gnuplot provide values for missing columns. For example, plot 'file' with errorbars plot 'file' using 1:2:(sqrt($1)) with xerrorbars plot 'file' using 1:2:($1-$3):($1+$3):4:5 with xyerrorbars The last example is for a file containing an unsupported combination of relative x and absolute y errors. The using entry generates absolute x min and max from the relative error. The y error bar
Gnuplot Xyerrorbars
is a vertical line plotted from (x, ylow) to (x, yhigh). If ydelta is specified instead of ylow and yhigh, ylow = y - ydelta and yhigh = y + ydelta are derived. If there are only two numbers on the record, yhigh and ylow are both set to y. The x error bar is a horizontal line computed in the same fashion. To get lines plotted between the data points, plot the data file twice, once with errorbars and once with lines (but remember to use the notitle option on one to avoid two entries in the key). Alternately, use the errorlines command (see errorlines (p.)). The error bars have crossbars at each end unless set bars is used (see set bars (p.) for details). If autoscaling is on, the ranges will be adjusted to include the error bars. See also http://gnuplot.sourceforge.net/demo/mgr.htmlerrorbar demos. See plot using (p.), plot with (p.), and set style (p.) for more information. Next: Errorlines Up: Plot Previous: Zticlabels Contents Index Ethan Merritt 2007-03-03
xlabel "Angle (deg)" set ylabel "Amplitude" set key box set title "Bragg reflection -- Peak only" plot "big_peak.dat" title "Rate" with errorbars, \ "" smooth csplines t "Rate" Click here for minimal script to generate this plot set bars small replot set bars large
Gnuplot Boxerrorbars
# Click here for minimal script to generate this plot set samples 300 set xlabel "Time gnuplot error bars color (sec)" set ylabel "Rate" set title "Ag 108 decay data" plot "silver.dat" t "experimental" w errorb, \ "" smooth csplines t "cubic smooth" # gnuplot boxerrorbars example error is column 3; weight larger errors less # start with rel error = 1/($3/$2) Click here for minimal script to generate this plot S=1 plot "silver.dat" t "experimental" w errorb,\ "" u 1:2:(S*$2/$3) smooth acsplines t "acspline Y/Z" Click here http://gnuplot.sourceforge.net/docs_4.2/node140.html for minimal script to generate this plot plot "silver.dat" t "rate" w errorb,\ "" u 1:2:($2/($3*1.e1)) sm acs t "acspline Y/(Z*1.e1)",\ "" u 1:2:($2/($3*1.e3)) sm acs t " Y/(Z*1.e3)",\ "" u 1:2:($2/($3*1.e5)) sm acs t " Y/(Z*1.e5)" Click here for minimal script to generate this plot set logscale y set grid x y mx my replot Click here for minimal script to generate this plot unset logscale y plot "silver.dat" t "experimental" w errorb,\ "" smooth sbezier t "bezier" Click here for http://gnuplot.sourceforge.net/demo/mgr.html minimal script to generate this plot set logscale y plot "silver.dat" t "rate" w errorb, \ "" smooth sbezier t "bezier" # Click here for minimal script to generate this plot set samples 100 unset logscale unset grid set xlabel "Resistance [Ohm]" set ylabel "Power [W]" set title "UM1-Cell Power" n(x)=1.53**2*x/(5.67+x)**2 plot [0:50] "battery.dat" t "Power" with xyerrorbars, n(x) t "Theory" w lines Click here for minimal script to generate this plot plot [0:50] "battery.dat" t "Power" with boxxy, n(x) t "Theory" w lines Click here for minimal script to generate this plot plot [0:50] "battery.dat" u 1:2:3 t "Power" w xerr, n(x) t "Theory" w lines Click here for minimal script to generate this plot plot [0:50] "battery.dat" u 1:2:4 t "Power" w yerr, n(x) t "Theory" w lines Click here for minimal script to generate this plot set logscale y plot [0:50] "battery.dat" u 1:2:4 t "Power" w yerr, n(x) t "Theory" w lines Click here for minimal script to generate this plot set logscale xy plot [1:50] "battery.dat" t "Power" w xyerr, n(x) t "Theory" w lines Click here for minimal script to generate this plot unset logscale set bars small plot [0:50] "battery.dat" t "Power" with xyerrorbars, n(x) t "Theory" w lines Click here for minimal script to generate this plot plot [0:50] "battery.dat" u 1:2:3 t "Power" w xerr, n(x) t "Theory" w lines Click here for minimal script to generate this plot plot [0:50] "battery.dat" u 1:2:4
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://stackoverflow.com/questions/10684182/gnuplot-with-errorbars-plotting developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; http://superuser.com/questions/272389/plotting-error-bars-with-gnuplot it only takes a minute: Sign up gnuplot with errorbars plotting up vote 9 down vote favorite 4 The data in my "file.txt" file are as in the following (sample row shown) 31 1772911000 6789494.2537881 Note that the second error bars column is the mean and the third is the standard deviation of my input sample. So, for the error bar, I would need the bar at the x axis value 31, with the error bar start at (second column value)-(third column value), and end at (second column value)+(third column value). I tried the following: plot "file.txt" using ($1-$2):1:($2+$1) with errorbars but the result is inappropriate. Any help? plot gnuplot share|improve this question asked May 21 '12 at 11:16 user506901 3343613 gnuplot error bars add a comment| 2 Answers 2 active oldest votes up vote 16 down vote accepted You need x:y:err, so try plot "file.txt" using 1:2:3 with yerrorbars You may instead want candlesticks. These are generally a box with error bars extending out of the top and bottom, but setting the mins and maxes the same should give you boxes of the required size: plot "file.txt" using 1:($2-$3):($2-$3):($2+$3):($2+$3) with candlesticks share|improve this answer edited May 21 '12 at 14:13 answered May 21 '12 at 11:38 Phil H 12.6k54083 Thanks. The first worked, but the second produced gnuplot> set style boxplot candlesticks ^ expecting 'data', 'function', 'line', 'fill' or 'arrow' gnuplot> –user506901 May 21 '12 at 11:47 2 @user506901 -- It looks (to me from the gnuplot docs) that you would just need plot "file.txt" using ... with candlesticks -- I'm not sure what Phil H was doing with set style boxplot candlesticks ... (I'm using gnuplot 4.4.2), maybe this behavior has changed in 4.6? –mgilson May 21 '12 at 12:30 @mgilson: You're right, I was trusting my understanding of the help file, I don't use candlesticks often enough to remember. Fixed now, thanks. –Phil H May 21 '12 at 13:56 1 @PhilH -- the offending line set style boxplot candlesticks is still there ;-) -- You'll want to remove that line as well. –mgilson May 21 '12 at 14:10 @mgil
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Plotting Error Bars with GNUPLOT up vote 3 down vote favorite 1 I can't get gnuplot to make a plot with error bars when my x values are non-numeric. For an example "data.dat": day col1 col2 MONDAY 12 4 TUESDAY 10 3 WEDNESDAY 9 2 THURSDAY 11 3 FRIDAY 9 2 SATURDAY 12 3 SUNDAY 8 2 I've tried variants of plot "./data.dat" using 2:3:xtic(1) with yerrorlines plot "./data.dat" using 2:3:xtic(1) with yerrorlines plot "./data.dat" using 1:2:3 with yerrorlines And get back either Not enough columns for this style or warning: Skipping data file with no valid points x range is invalid What would the plot command be to plot (day,col1,col2) => (x,y,y_err)? gnuplot share|improve this question asked Apr 18 '11 at 15:39 Andrew Wood 5541618 add a comment| 1 Answer 1 active oldest votes up vote 4 down vote accepted xtic, or xticlabels, does not count as a data column. That is why yerrorlines is complaining about not enough columns. You can provide the implicit column 0 for an enumeration. plot "./data.dat" using 0:2:3:xticlabels(1) with yerrorlines share|improve this answer answered Apr 18 '11 at 19:34 lesmana 8,35742635 1 And when not using with yerrorlines there is an implicit column 0 when plot doesn't have enough columns? Odd... –Andrew Wood Apr 19 '11 at 12:53 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree t