Lines And Error Bars Gnuplot
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ylow and yhigh, default format)" plot "err.dat" with errorbars will result in (gif mode) # this
Gnuplot Error Bars Style
should look the same set title "Demonstration of error bars (both gnuplot error bars standard deviation ylow and yhigh)" plot "err.dat" using 1:2:3:4 with errorbars will result in (gif mode) set title "Demonstration
Gnuplot Error Bars Histogram
of boxes" plot "err.dat" with boxes will result in (gif mode) set title "Demonstration of boxerrorbars" plot "err.dat" with boxerror will result in (gif mode) set title gnuplot set bars "Demonstration of xybars" plot "err.dat" using 1:2:3:4:5 with xybars will result in (gif mode) set autoscale set title "Demonstration of error bars (both ylow and yhigh)" set xlabel "Date\nTime" set timefmt "%y%m%d" set xdata time set key right set format x "%m/%d\n%y" plot "futures.dat" using 2:3:4:5 with errorbars will result in (gif mode) set title gnuplot error bars color "Demonstration of financebars" plot "futures.dat" using 2:3:4:5:6 with financebars will result in (gif mode) set title "Demonstration of candlesticks" plot "futures.dat" using 2:3:4:5:6 with candlesticks will result in (gif mode) set xrange [-3:65] set yrange [ 4:14] set timefmt "" set xdata "" set xlabel "" set format x "" set tics set title "Demonstration of error bars (only ydelta)" plot "err.dat" using 1:2:5 with errorbars will result in (gif mode) set title "Plot data file twice to get lines and errorbars" plot "err.dat" with lines, "err.dat" using 1:2:3:4 with errorbars will result in (gif mode) set logscale y set title "Demonstration of error bars (only ydelta) with y logscale" plot [-3:65] [1:100] "err.dat" using 1:2:5 with errorbars set nologscale y will result in (gif mode) set logscale x set title "Demonstration of error bars (only ydelta) with x logscale" plot [1:100] [4:14] "err.dat" using 1:2:5 with errorbars set nologscale x will result in (gif mode) set autoscale set nologscale set title "" woo@playfair.stanford.edu
by the various errorbar styles. In the default situation, gnuplot expects to see three, four, or six numbers on each line
Gnuplot Xyerrorbars
of the data file -- either (x, y, ydelta), (x, y, gnuplot boxerrorbars ylow, yhigh), (x, y, xdelta), (x, y, xlow, xhigh), (x, y, xdelta, ydelta), or (x, y, xlow,
Gnuplot Boxerrorbars Example
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 http://www.csse.uwa.edu.au/programming/gnuplot_demos/errorbar/errorbar.html 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 http://gnuplot.sourceforge.net/docs_4.2/node140.html 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
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 http://stackoverflow.com/questions/10684182/gnuplot-with-errorbars-plotting 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 6.2 million programmers, just like you, helping each other. Join them; 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 column is the mean and the third is error bars 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 add a comment| 2 Answers 2 active oldest votes up vote gnuplot error bars 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 @mgilson: Duh. Cheers. –Phil H May 21 '12 at 14:13 add a comment| up vote 3 down vote you can also try: plot