Gnuplot Error No Data In Plot
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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 gnuplot data file format about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users gnuplot script file Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping gnuplot cannot find or open file each other. Join them; it only takes a minute: Sign up How to create a data file for gnuplot? up vote 18 down vote favorite 8 I'm trying to make a graph with gnuplot. I specified my xrange, gnuplot data file multiple columns yrange, and labels, but when I typed in the following command: gnuplot> plot "data.txt" using 1:2 with lines gnuplot tells me: warning: Skipping unreadable file "data.txt" No data in plot. I don't understand how my data file is unreadable. This is what my data.txt looks like: X Y [I didn't enter X and Y into my text file] 10000 0.030 5000 0.02 1000 0.012 I know I must be doing something wrong -- this is my first
Gnuplot Skipping Data File With No Valid Points
time using gnuplot. I tried doing a Google search on how to make a proper data.txt file turns up zilch. EDIT: I feel like this may sound strange to ask at a programming Q&A site, but what should a typical text file w/data look like? I'm no computer programmer, just an undergrad trying to plot a graph for her biochemistry class. gnuplot share|improve this question edited Sep 21 '11 at 3:25 David Nehme 15.3k55089 asked Sep 21 '11 at 1:46 Halime 200117 add a comment| 8 Answers 8 active oldest votes up vote 7 down vote accepted plot "data.txt" using 1:2 with lines works for me. Do you actually have blank lines in your data file? That will cause an empty plot. Can you see a plot without data? Like plot x*x. If not, then your terminal might not be set up correctly. share|improve this answer answered Sep 21 '11 at 1:58 David Nehme 15.3k55089 1 The way I typed up the text file is exactly how I have it in my post. I do see a plot---I plotted a sin(x) graph just to make sure gnuplot wasn't acting buggy and it came out just fine. –Halime Sep 21 '11 at 2:38 Ok, so your gnuplot is able to produce plots. If you have blank lines in your data file, you will get an empty
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Gnuplot Command File
Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs gnuplot file extension Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, gnuplot read data from file to variable just like you, helping each other. Join them; it only takes a minute: Sign up Gnuplot says file is unreadable up vote 1 down vote favorite I have a file called "data_prova.dat" in my folder, as you http://stackoverflow.com/questions/7493703/how-to-create-a-data-file-for-gnuplot can see: gnuplot> !ls data_prova.dat But when I ask gnuplot to plot it, it says: warning: Skipping unreadable file "./data_prova.dat" No data in plot which is just false, because: wc -c data_prova.dat 2640413132 data_prova.dat Can this be because the file is too large? file-io gnuplot share|improve this question edited Jul 4 '13 at 9:09 asked Jul 4 '13 at 9:03 mar tin 7211331 1 It says unreadable Could be premissions or invalid data http://stackoverflow.com/questions/17466190/gnuplot-says-file-is-unreadable or simply to big. –Devolus Jul 4 '13 at 9:06 It is telling you the file is unreadable, not that it is not present. Big difference. –fvu Jul 4 '13 at 9:06 got any reference on the maximum readable size? –mar tin Jul 4 '13 at 9:07 Please look here, it may just be a data format problem and not a size problem. There is no hardcoded size limit –fvu Jul 4 '13 at 9:10 Thanks, the format is not the problem, because everything has worked other times and this is the output of a .c file. In any case, I shortened it and now it gets plotted, so it must be an issue with the size. –mar tin Jul 4 '13 at 9:30 | show 1 more comment 1 Answer 1 active oldest votes up vote 0 down vote I have the same problem then I changed my file name, Now it's working share|improve this answer answered Mar 24 at 7:14 Rajesh Dhiman 1 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
in those tutorials using gnuplot, a command-line-driven plotting program commonly available on Unix machines (though available for other platforms as well). You may find it helpful to look at the other tutorials as well; this one is intended to follow https://www.cs.hmc.edu/~vrable/gnuplot/using-gnuplot.html them quite closely. The instructions and samples given correspond to version 3.7 running under Linux, but the results should be similar everywhere. If you are using an older version, however, you might find a few of the more advanced features missing. Introduction gnuplot seems almost the antithesis of Kaleidagraph: the the Kaleidagraph tutorial calls Kaleidagraph "an easy-to-use if somewhat limited graphics program". gnuplot is a not-quite-as-easy-to use, though extremely powerful, command-line plotting program. Running gnuplot is easy: data file from a command prompt on any system, type gnuplot. It is even possible to do this over a telnet or ssh connection, and preview the graphs in text mode! For best results, however, you should run gnuplot from within X Window, so that you can see better previews of your plots. Entering Data All the data sets you use in gnuplot should be typed into a text file first. There should be one data point per line. gnuplot data file Each data point will consist of several numbers: the independent variable, the dependent variable, and optionally error bars. Each of these fields should be separated by a tab. Actually, any number of fields may be specified on each line; this is useful if you have multiple measurements for each data point, for instance. For information about how to access this additional information in your plots, see (fixme: add section) below. You may include any extra information you want in the file, such as a description of the data, headings for each of the data columns, and so on, as long as each such line begins with the comment character, #. The dataset used in this example is available in the file cavendish.data. Plotting Functions Basic Plotting Plotting functions in gnuplot is really quite easy. Suppose you want to plot the function f(x) = exp(-x^2 / 2). In gnuplot, exponentiation uses **, not ^. So, after starting up gnuplot, at the gnuplot> prompt you would type: plot exp(-x**2 / 2) Usually, you'll want a little more control over your plot, at least specifying the ranges for the x- and y-axes. You can specify these in a [minimum:maximum] form before the function. Specify the x range first, then the y range. You may leave off the y range, or both. We can revise our previous plot command to: plot [-4:4] exp(-x*