Gnuplot Xy 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
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Gnuplot Boxerrorbars
more about Stack Overflow the company Business Learn more about hiring developers or gnuplot error bars color posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow gnuplot boxerrorbars example Community Stack Overflow is a community of 4.7 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 http://gnuplot.sourceforge.net/docs_4.2/node140.html 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 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 http://stackoverflow.com/questions/10684182/gnuplot-with-errorbars-plotting (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 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? &ndas
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 http://stackoverflow.com/questions/32413885/how-to-do-a-fit-with-gnuplot-using-data-with-error-in-x-and-y about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges http://stackoverflow.com/questions/11347444/adding-error-bars-on-a-bar-graph-in-gnuplot 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; it only takes a minute: Sign up How to do a fit with gnuplot using data with error in x and y? up vote 0 down vote favorite How to do a fit with data error bars like this: x y deltax delta y, i have to do a linear fit weighted to the error in both axis what is the exact syntax ? fit f (x) "file.txt" u1:2:3:4 via a, b with xyerrorbars f (x) =a*x + b Result: singular matrix in invert_RtR gnuplot linear data-fitting share|improve this question edited Sep 5 '15 at 14:42 asked Sep 5 '15 at 13:59 physnolimits 113 The xyerrorbar style is for plotting. You cannot give gnuplot error bars with styles for fitting. –Karl Sep 5 '15 at 19:32 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote accepted To fit with x and y errors you need gnuplot 5. Then use the syntax f(x) = a*x + b fit f(x) "file.txt" using 1:2:3:4 xyerrors via a,b See the last example on http://gnuplot.sourceforge.net/demo_5.0/fit.html for a full demo. share|improve this answer answered Sep 5 '15 at 15:24 Christoph 29.5k72847 I have gnuplot 5 i'll try –physnolimits Sep 5 '15 at 16:11 add a comment| up vote -2 down vote Since there is no code that you tried beforehand so we can edit it, I'm providing a very generic solution here. For linear fit, use using (1) in your fit command for equal weights. For examples of fit command syntax, see this one. Of course, the manual has complete details of fit and using. share|improve this answer answered Sep 5 '15 at 14:33 Emacs User 1,014616 But i have x and y plus their errorbars –physnolimits Sep 5 '15 at 14:40 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 to the
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 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; it only takes a minute: Sign up Adding error bars on a bar graph in gnuplot up vote 7 down vote favorite 2 I have the following file I want to plot using gnuplot bar graphs: Function X X-ERROR Y Y-ERROR A 1.311539 0.066268 1.000000 0.000000 (a1,b0) 1.325429 0.083437 1.010926 0.016710 (a.9,.b1) 1.134640 0.040017 1.276168 0.060281 (a.8,.b2) 1.078336 0.058529 1.346358 0.054645 (a.7,.b3) 1.035866 0.060660 1.318395 0.018087 (a.6,.b4) 0.982717 0.047363 1.196714 0.047427 (a.5,.b5) 0.962423 0.051994 1.127991 0.044731 (a.4,.b6) 0.953673 0.046014 1.139608 0.044726 (a.3,.b7) 0.948948 0.050462 1.169209 0.044333 (a.2,.b8) 0.941013 0.047166 1.198138 0.045844 (a.1,.b9) 0.929961 0.057801 1.328111 0.088813 (a0,b1) 0.966331 0.036079 3.289381 0.213192 B 1.000000 0.000000 3.321802 0.121290 I can manage to plot the graph perfectly using: plot 'file.dat' using 4:xtic(1) title col, \\ '' using 2:xtic(1) title col; However I would like to use columns 3 and 5 to represent the interval of confidence that I always calculated. Any help? Thanks! gnuplot share|improve this question edited Jul 5 '12 at 15:25 Sirko 42.5k1069105 asked Jul 5 '12 at 15:20 Dynelight 7622833 add a comment| 2 Answers 2 active oldest votes up vote 9 down vote accepted Assuming you want to draw side-by-side bar charts with associated error bars, I would use the following: set xrange [-0.5:12.75] set xtic rotate by -45 set boxwidth 0.25 plot 'file.dat' using ($0-.05):4:5:xtic(1) with boxerrorbars title col, \\ '' using ($0+0.25):2:3 with boxerrorbars title col The idea is just to offset o