gnuplot

问题 I would like to generate several plots using Gnuplot thats why I need to use loop. The data is loading from files "sort'i'.dat". The code is shown below but it doesn't work. I have got some problem with main loop. I don't know why it doesn't work, maybe it is connected with my version of Gnuplot. Thanks. do for [i=0:10] { set term png set output 'sort'.i.'.png' set title "Quick sort" set xlabel "Position number" set ylabel "Number on position" unset key plot 'sort'.i.'.dat' using 1:2 with

问题 How do I plot a vector field, where the direction at each point (x, y) is given by tangent(alpha) = f(x, y) ? 回答1: As far as I can tell, gnuplot can only plot vector fields when reading data from a file. Your file will have to have 4 columns, x, y, deltax and delta y, and gnuplot will then plot a vector from (x,y) to (x+deltax, y+deltay) for each line in the file: plot "file.dat" using 1:2:3:4 with vectors head filled lt 2 If you are not insisting on using gnuplot, there are other tools that

问题 I know on gnuplot you can plot some data with circles as the plot points: plot 'data.txt' using 1:2 ls 1 with circles How do I then set the size of the circles? I want to plot several sets of data but with different size circles for each data set. 回答1: If you have a third column in your data, the third column specifies the size of the circles. In your case, you could have the third column have the same value for all the points in each data set. For example: plot '-' with circles 1 1 0.2 e

问题 The gnuplot command set datafile missing "nan" tells gnuplot to ignore nan data values in the data file. How to ignore both nan and -nan ? I tried the following in gnuplot, but then the effect of the first statement is overwritten by the next. gnuplot> set datafile missing "-nan" gnuplot> set datafile missing "nan" Is it possible to somewhow embed a grep -v nan in the gnuplot command, or even some kind of regexp to exclude any imaginable non-numerical data? 回答1: It is not possible to use a

问题 I'm having trouble using the pointtype command on gnuplot. I've tried several ways such as: set pt 5 set pointtype 5 plot " " w pt 5 plot " " w pointtype 5 And for some reason nothing seems to work. I tried using the "help" feature, and apparently my version of gnuplot doesn't have "pt" or "pointtype" as an option. Is this perhaps listed as some other feature. I know the points are there, when I plot multiple sets of data, the point type automatically changes, but I have no personal control

问题 I have a csv file which has 5 entries on every row. Every entry is whether a network packet is triggered or not. The last entry in every row is the size of packet. Every row = time elapsed in ms. e.g. row 1 , 0 , 1 , 2 , 117 How do I plot a graph for e.g. where x axis is the row number and y is the value for e.g. 1st entry in every row? 回答1: This should get you started: set datafile separator "," plot 'infile' using 0:1 回答2: You can also plot to a png file using gnuplot (which is free):

问题 My data runs from 0 to 800000 on the x-axis and I have 4 plots in a square. To make the scale readable, I'd like to label the ticks from 0 to 8 (i.e. with %1.0t ) and write the *10^5 at the end of the scale. I tried several format options, but all of them add *10^5 or e5 behind each tick. Is there a way to only put it in the end instead of each one? 回答1: set xtics 100000 format "%1.0t" set label "*10^5" at graph 1, 0 offset 4 However the more conventional approach is to explain the scale in

问题 I am trying to merge and sort two CSV files skipping the first 8 rows. I try to sort one of the files by the 36th column I use: awk '(NR>8 ){print; }' Hight_5x5.csv | sort -nk36 and to merge the two files: cat Hight_5x5.csv <(tail +8 Hight_5x5_b.csv) The sort command it does not work. I would like two use both actions in a command and send the result to the plot command of gnuplot. I have tried this line: awk '(NR>8 ){print; }' (cat Hight_5x5.csv <(tail +8 Hight_5x5_b.csv)) | sort -nk36 and

问题 I am using the SVG terminal in Gnuplot 4.7 and trying to have both hypertext and hyperlink work on the browser, activated by mouse hover and mouse click respectively on the plotted data points. The mouse hover works thanks to the help from stackoverflow on my previous question. My data input file looks like this: X Y Label Color Hyperlink 0 0 net0 2 net0.txt 1 1 net1 2 net1.txt 2 2 net2 2 net2.txt 3 4 net3_outlier 1 outlier.txt 4 4 net4 2 net4.txt My script script.gp looks like this: set

问题 I am plotting heatmap of this data using the following code reset set terminal pngcairo size 800,800 set output 'Temp.png' #set terminal tikz #set output 'Temp.tex' set lmargin at screen 0.05 set rmargin at screen 0.85 set bmargin at screen 0.1 set tmargin at screen 0.9 set palette defined ( 0 '#000090',\ 1 '#000fff',\ 2 '#0090ff',\ 3 '#0fffee',\ 4 '#90ff70',\ 5 '#ffee00',\ 6 '#ff7000',\ 7 '#ee0000',\ 8 '#7f0000') set pm3d map interpolate 20,20 unset key set multiplot # plot the heatmap splot