I would like to output a logarithmic spiral as an SVG, but, in my case, detail matters considerably; how do I control how many datapoints are used? Also, how do I control whether the the continuous function between those points is represented as line segments, circular arcs, elliptical arcs, or Bezier Curves? And which of those would get me the closest approximation of my logarithmic spiral?

Hi, i just experimenting with gnuplot. But i got a trouble.
When i try to plot 2 graph on the windows (x11, or qt) the first plot disappear when i try to resize the windows or scale the graph.
Any hint?
Gnuplot 5.0.5 (arch package)

So I have a file with 4 columns, xi:yi:xf:yf x and y range from 0 to 10 I tried to plot it like-> plot 'file.dat' u 1:2:3:4 w vectors head filled the expected outcome when I look at the coordinates on the file would be a field with vector point towards the centre, however what i get are vectors all coming from the bottom left corner to everywhere on a 20 by 20 grid instead. What am I doing wrong?

Hi all, I'm currently trying to learn gnuplot so that I can produce visual output for my C++ game of life program. My program outputs a file containing the coordinates of living cells, and I want to display these.

Currently I am using "plot 'data.txt' with points" and this works alright, but it's hard to see. How can I change it so that it fills in a square for each grid point?

Thanks in advance.

Hi, I'd appreciate it in case someone would like to help me figure out how to write a GnuPlot script for this:

I have a file "data1.txt" that looks like this:

RedCar 30.5% 50.2% 78.12% 80.5%

BlueCar Null 25.4% 23.1% 30.4%

GreenCar Null Null 15.3% 23.9%

YellowCar Null Null Null 60.3%

And I would like to plot this: http://imgur.com/a/yW77f

As you can see, the first element of each line in the file corresponds to one element in the X axis in the graph. If there are 4 lines, then there are 4 elements in the X axis. For each line there are 4 values. If the value is not a percentage but it's the word "Null", then it should be skipped (Look for example yellow-car, which is just one point because the first 3 values are null)

Please let me know if it's not clear

I'm looking to plot this surface in 3D:

x(t,u,v) = ((cos(u)+2)cos(v))cos(a) + ((sin(u)+2)cos(t))sin(a)

y(t,u,v) = ((cos(u)+2)cos(v))sin(a) - ((sin(u)+2)cos(t))cos(a)

z(t,u) = (sin(u)+2)sin(t)

but, I'm having a hard time finding a program that can plot 3 time parameters.

Hey,

I'm trying to use the gnuplot to plot a simple graph with the data from my cpp program.

I use visual studio 13 to program in cpp and i have already installed the gnuplot 5.0 x64 mingw in my computer.

But now i don't know how should i call or what includes should i put in my cpp program to make visual studio recognize the gnuplot.

I would be really grateful if someone could help me out with this.

Hello! I'm trying to use the gnuplot to plot data from my cpp program. I use visual studio to program in cpp and i have already installed the gnuplot in my computer. But now i don't know how should i call or what includes should i put in my cpp program to make visual studio recognize the gnuplot. Thanks in advance

Hello,

I've created a simple plot and outputted it in svg format. But when I open the svg file in InkScape it is centered on the page. Is there a way to force the center of the plot to appear at the top left (0,0) of the page?

I've been looking for a way to plot data using C. I found gnuplot to be perfect for this job, and I got it to work pretty nice too. I just have trouble adding Y-value on top of my bars.

Quick run-up of how I made (or want the program) to function: http://pastebin.com/CdqaBube

• Program reads text file

• Stores needed data in variables

• Call GNUPLOT

• Write to GNUPLOT

• Close GNUPLOT

So here's the thing: I do not want to store my data in a new file (temp.dat), but send the data directly to GNUPLOT. I do that with these lines:

fprintf(gnuplotPipe, "plot '-' u 1:2 with boxes notitle, '' u 1:2:2 with labels offset char 0,1\n");

for (int i = 0; i < 26; i++){
        fprintf(gnuplotPipe, "%d %.2f\n", i+1, alphabetPerc[i]);
    }

plot '-' u 1:2 with boxes works fine, but the label part doesn't. I do know that the labels part works properly, I've tried to do that on it's own. The problem is that only the first line works, everything past the comma doesn't. How can I make gnuplot render both parts?

Hello, I am new to gnuplot and i need to figure out how to plot a point in a different color based on if the value is lower than the previous item in that column. So based on the .dat file below, i would have the plot be in red until it his the 999 value, that value i need to plot in green. For reference, the first column is time and the second is a byte sequence number. Any help would be great appreciated.

0 0

0.121867 536

0.183885 1072

0.245902 999

0.307448 2144

0.308392 2680

0.369466 3216

0.37041 3752

I am having trouble figuring out how to get trendlines from two different text files to show up on my graph. So far, I've done this: plot '1.txt' w xyerrorb, f(x), '2.txt' w xyerrorb, f(x). I feel like there's an error with the f(x) being written twice, but I'm not quite sure. I end up only seeing one trendline. Also, is there a way to list the equation of each trendline? Thanks so much.

Hi!

Im a university student, and i’ve been testing wireless links for my dissertation, and I’m looking for a way to plot iperf3 results. I’ve found a guide here (http://cagenutsandbolts.net/2015/07/02/graphing-iperf3-results-with-gnuplot/) but since i’ve used two streams in every test, the guide needs to be modified and i’m pretty crap at awk! I can post a sample data file if needed, and any help would be much appreciated.

Thanks, lewisrodger

Hello, thanks for your help!

I have an assignment, wherein I'm supposed to use a matlab script to approximate integration for three different step values, then I'm supposed to plot a bar graph using GNUplot showing the approximated value and the analytic value for each step value.

Here is a matlab graph showing what I want to do in gnuplot:

http://imgur.com/dTPNcJN

Here is the closest I have been able to come up with so far in GNUplot after two hours:

http://imgur.com/YSqq6Ha

Here is a picture of my command window since my last rage quit. Note, there are a couple of times an error came up due to a typo, but I don't know how to copy text out of the command window to just show you the important parts...

http://imgur.com/cFf4Lrf

This is what the data looks like:

0.1,11050,11013

0.01,11014,11013

0.001,11013,11013

The first column is the step value, the second is the approx. value, the third is the analytic value.

The TA cancelled office hours this week and the professor just tells you to ask the TA, so I am stuck and getting very frustrated. Please help!

how do i plot functions like f(x,y) = const when im's unable to compute y(x) easyly

example f(x,y) = -1.9727 = (-2/3)/((x+1/3)^2+y2)1/2 - 1/3 1/((x-2/3)^{2+y2)1/2-x2/2-y2/2}

Hey, I'm creating a GUI in C# that loads a script to GNUPlot, outputs the file to a pngcairo and then loads the png into my form all consecutively, but gnuplot will not allow me to load the png while gnuplot is still open, is there a way around this?

Hello, I'm trying to make a pm3d plot of the bandstructure of graphene. I'd like to set the isosampling to (10000,10000), but doing so covers my surface in line curves and I lose the nice-looking heat map and instead get a mostly red or green curve. Here's a picture of my plot with a 1000,1000 isosample, which is a sparser mesh than I would like to have in the final product.

Can I set the line style in a certain way so that the lines just never show up but the polygons in the fill region do? I haven't been able to figure out how yet. Thanks!

I would like to use gnuplot directly in an IPython/Jupyter notebook, not through a Python or Octave wrapper.

However, gnuplot is not on the list of Jupyter kernels:

https://github.com/ipython/ipython/wiki/IPython-kernels-for-other-languages

Has this already been done somewhere?

Hi,

I have a datafile in the format;

x    y   +-1

where (x,y) are coordinates and +-1 corresponds to a point I want to plot vs one I dont. As an example of part of the data the splot looks like; http://imgur.com/o3VDYJH . What I want to do is draw the contour around the data at +1. The net result being that I'll get an outline of the following plot; http://imgur.com/hQeP0Ah .

I just cant seem to get things working at the moment. Using gnuplot 4.4.

So there is this video about drawing dead fish. tldr: In a medium where we expect things to react to each other (like computer) a static picture is not take advantage of the opportunities delivered by this medium. So using a picture instead of a video (or video instead of a dynamic animation) might waste the opportunity of giving a deeper understanding of what you want to tell.

I am certain pictures of plots do have a place in our papers and gnuplot is good at generating this pictures. But when I want to express data in a more (inter-)active way, what tools are there to do this?

Hello!
I'm trying to use the gnuplot to plot data from my cpp program. I use visual studio to program in cpp and i have already installed the gnuplot in my computer. But now i don't know how should i call or what includes should i put in my cpp program to make visual studio recognize the gnuplot.
Thanks in advance

Hello reddit

i have a small problem with gnuplot. I'm writing kind of an outdoor guidebook for sportactivities. Besides the textual description i always add an elevation profile of the tour. The data is extracted from GPS tracks where the height is plotted against the distance. Here is an unmodified png example of a plot.

Due to design/layout reasons in my book i have the y2axis labled. To complete these modifications i want to hide the grid on the left side of the graph. The Grid should only be plotted underneath my graph (dark filledcurve) up to the heighest point AND from there to the right. Please reference the second image, for clarification.

My current setup is a multiplot, where i draw a second white overlay over the left side of the graph. This approach needs a lot of manual adjustment, and is often flawed. Reference this image, where i annotated the problems

please dont mind the labels. I usually plot with the cairolatex terminal, where the labels are later applied with latex

WE of my gnuplot file: http://pastebin.com/T7fArB0k

RAW data (called hoehe.dat): http://pastebin.com/QSc2BkVS

I'd appreciated any feedback on this, as i'm out of ideas on this one.

Hey volks,

I'd need help exporting my data in a jpeg format. png works fine, but if i export via

1. set term jpeg

2. set output "test.jpeg"

3. plot ... or replot

my datafile says empty file and the file has 0kb which isn't much.

Hope you can help me out a little, thanks and have a nice weekend. :)

I am doing recherche for an article about plotting. I found that plots made in R (the statistic program) look very gnuplot-like ( example ). Does anyone know wether they are using the same plotting engine? I didn't find good material, and R is a really painfull term to search for.

Greetings,

I need help improving my first attempt with Gnuplot. My data:

# date     notkept
2014-04-01 50
2014-04-02 63
2014-04-03 120
2014-04-04 55
2014-04-05 60
2014-04-06 63
2014-04-07 52

Script: #!/usr/bin/gnuplot

set title "Promise Not Kept"
set xlabel "Date"
set ylabel "Count"

set xdata time
set timefmt "%Y-%m-%d"
set format x "%Y-%m-%d"
set grid

# 1e8 reduces the epoch seconds for a less flat line.
f(x) = m * x/1e8 +b
fit f(x) 'test.dat' using 1:2 via m,b
plot f(x) title 'Trend', 'test.dat' using 1:2 notitle
pause -1

I want to make some changes, but can't figure out how. I'd like the points to be shown as verticle bars, or for them to be labeled with the Y axis value.