I had to add setenv(“GNUTERM”,”X11″) to OCTAVE_HOME/share/octave/site/m/startup/octaverc (OCTAVE_HOME usually is /usr/local) to make it work permanently. Solution found and more details on: http://www.mac-forums.com/forums/os-x-apps-games/242997-plots-octave-dont-work.html
This is not supposed to be a solution, but rather an explanation and a possible, although ugly workaround. From time to time there are reports to the gnuplot mailinglists about this issue, but it seems to be related to the viewers. It has to do with the way gnuplot creates the surfaces plots. These are … Read more
If you are using Gnuplot 5.1 or superior and need a 1-d array, you simply define the array with size N, remembering that the indices go from 1 to N: gnuplot> array A[3] #Array definition gnuplot> A[1]=2 gnuplot> A[3]=4 gnuplot> print A[1] 2 gnuplot> print A #Print the array, with empty A[2] [2,,4] If you … Read more
If I get your question correctly, you could do something like this. >>> import matplotlib.pyplot as plt >>> testList =[(0, 6.0705199999997801e-08), (1, 2.1015700100300739e-08), (2, 7.6280656623374823e-09), (3, 5.7348209304555086e-09), (4, 3.6812203579604238e-09), (5, 4.1572516753310418e-09)] >>> from math import log >>> testList2 = [(elem1, log(elem2)) for elem1, elem2 in testList] >>> testList2 [(0, -16.617236475334405), (1, -17.67799605473062), (2, -18.691431541177973), (3, … Read more
+1 for a great question. I (mistakenly) would have thought that what you had would work, but looking at help datafile using examples shows that I was in fact wrong. The behavior you’re seeing is as documented. Thanks for teaching me something new about gnuplot today 🙂 “preprocessing” is (apparently) what is needed here, but … Read more
There are several possiblities to set a point/dot: 1. set object If you have simple points, like a circle, circle wedge or a square, you can use set object, which must be define before the respective plot command: set object circle at first -5,5 radius char 0.5 \ fillstyle empty border lc rgb ‘#aa1100’ lw … Read more
This following works for me (gnuplot 4.4) plot “./file.dat” u 1:2:3 with lines palette Hope this helps. When I ran your code gnuplot couldn’t pass the “rgb” part. For an example of using the variable tag see the similar question: GNUPLOT: dot plot with data depending dot size with the useful examples found here: http://gnuplot.sourceforge.net/demo/pointsize.html … Read more
I had the same problem: wanted to plot line(s) with non-uniform color, which I wanted to be dependent on a third variable (z). But I definitelly wanted to use a line, not markers (as in @joaquin’s answer). I found a solution in a matplotlib gallery example, using the class matplotlib.collections.LineCollection (link here). Here is my … Read more
It appears that the “every” command in gnuplot is what you’re looking for: plot “filename.txt” every ::1000::2000 using 1:2 with lines Alternatively, pre-process your file to select the rows in which you are interested. For example, using awk: awk “NR>=1000 && NR<=2000″ filename.txt > processed.txt Then use the resulting “processed.txt” in your existing gnuplot command/script.
Suppose we want to pattern an area between function y=f(x) >0 and y = 0. It is posiible to create different “patterns” by using the following method. (i) Create a file that has 4 columns (x, y, xdelta, ydelta). This file describes a set of lines with the same slope. (ii) Plot data from the … Read more