I have a program producing data like this:
0.5 0.5
0.49597550441921423 0.7868142593062702
0.5 0.5
0.6538646510750382 0.5364703734652149
an so on..
This is network topology data. I am told this is gnuplot friendly data however
I ask how to plot this data to gnuplot as it's is not a program I am
familiar with. Ideally the data should form star pattern clusters. Should also add
this data is in a .dat file however I worked it to a .txt for readability.
Thanks!
a simple:
plot 'yourdatafile' using 1:2
should plot something. However, actually customizing the plot to look exactly how you want it is the tricky part.
Related
In gnuplot, you can create a histogram like
binwidth=#whatever#
set boxwidth binwidth
bin(x,width)=width*round(x/width)
plot "gaussian.data" u (bin($1,binwidth)):(1.0/10000) smooth freq w boxes
Here, I am interested in a probability histogram, hence the 1.0/10000.
I have spend a lot of time reading the gnuplot documentation on using and what I understand is that I am telling gnuplot to plot data from gaussian.data using certain values for the x and y. In fact, when I open the data file associated with the plot command (achieved through making a temporary file), I see that the y values are 1/10000, as expected. But then, the x and y values change. It seems like there's something dynamic about it. I do not quite understand this behavior of using. Could anyone please guide me?
In case anyone else would like further explanation.
http://psy.swansea.ac.uk/staff/carter/gnuplot/gnuplot_frequency.htm
I have a problem with gnuplot. I've searched and I don't find the correct solution. I'm plotting some data arranged in three columns with the command splot, and the steps in x and y are different. The plot I get with:
set view map
splot 'data.dat' using 1:2:3 with points palette
is:
and I would like the white space to be filled, making each tile size adapt, avoiding interpolation.
Some ideas are given here Reduce distance between points in splot.
I've tryed http://gnuplot.sourceforge.net/demo/heatmaps.html too, but with image doesn't seem to work :(
I should avoid pointsize as my grid changes from time to time.
You can try
set pm3d map interpolate 1,1 corners2color c1
splot 'data.dat' using 1:($2-5e-5):3
This uses no interpolation, and the color of each polygon depends on the value of corner 'c1'. You may need to test if this is the correct one, or if you need 'c2', 'c3', or 'c4'.
Another solution to my problem, better than this one for some terminals at least, is given in the answers to my other question about maps appearance in pdfcairo terminal, where the solution comes when using plot with image insted of this splot. I tried to use that before, as I mention here, but maybe it also needed this specific data format.
I'm trying to present data in a boxplot with a few additions.
On top of the boxplot, i want to also print all the data points, since there aren't that many.
There will be many boxplots side by side, and the data points will correspond, so each data point in one plot will be represented in another boxplot, however their order can change. That's why I want to color the points.
I got this so far:
plot data using (1):($1) with boxplot,\
data using (1):($1) with points lc variable
[more plots...]
This needs an extra column in each datafile, that specifies the linecolor. Which works fine, if I had such a column, or if I could care to add it.
Is there another way to iterate through the linestyles (or colors), so it plots the first point with style 1, the second with style 2 etc.?
It seems like a real easy problem, that's either solved by some command I can't seem to find, or maybe by taking the linestyles from a different file, which would be the same for all plots (if that works in gnuplot).
Furthermore, I'd like to know if the boxplot command has the additional feature of being able to plot the average as well (or do I absolutely need the stats command from gnuplot 4.6, or some kind of hack).
Sometimes it's just nice to be able to simply add the average in a boxplot.
Is there another way to iterate through the linestyles (or colors), so it plots the first point with style 1, the second with style 2 etc.?
Yes. Gnuplot provides a number of pseudo-columns. To get more information, see
help datafile using pseudocolumn
But the gist of it is that you can use column(0) for this. I believe that iteration starts at 0 though. Since there isn't a ls 0, you'll need to add 1.
plot data using (1):($1) with boxplot,\
data using (1):($1):(column(0)+1) with points lc variable
Furthermore, I'd like to know if the boxplot command has the additional feature of being able to plot the average as well (or do I absolutely need the stats command from gnuplot 4.6, or some kind of hack).
I believe that you need either gnuplot 4.6 or some kind of hack. One such hack (which will work using gnuplot 4.4, but not earlier) could be:
sum=0.0
npt=0
compute_sum_npt(x)=(npt=npt+1,sum=sum+x,NaN)
set term unknown
plot data u 1:(compute_sum_npt($1))
avg=sum/npt
set term ...
set output ...
plot data using (1):($1) with boxplot,\
data using (1):($1):(column(0)+1) with points lc variable,\
avg w lines ls -1
If your version of gnuplot is earlier than 4.4, you'll need to use a shell command to compute the average. Something like awk should suffice.
I would like to draw a straight line that makes the average of a curve. I am plotting my data like that:
plot 'dataset' u 2:4 w p smooth bezier
My data consists of multiple columns and I would get something like that:
Any ideas of how to do it? I guess it is more an interpolation than an average. It is not relevant the ups and downs of the curve, and it would be much better to have a straight line interpolating the curve...
Using a straight line could be more or less easy to fit using fit however, how could I fit a curve that does not look like a well know curve? Let me show you an example? How could I fit a smooth curve among the main group of points? Please notice that there is some noise on the lower part of the graph that I wouldn't like to represent.
If you want to do some basic statistics on your data, gnuplot has a builtin command stats which may do what you want. Gnuplot offers some internal variables after plotting that contain data about min, max, etc. To see what these are, type show variables all after plotting your data.
Otherwise if you want to fit your data to a line, gnuplot does that as well:
f(x) = a*x + b
fit f(x) 'data.dat' using 2:4 via a,b
plot 'data.dat' using 2:4, f(x)
I have a frivolous question. Is there any way to use an image in lieu of points in gnuplot? For example, if I was plotting data about pasta consumption or something, I would have pictures of pasta (instead of usual gnuplot points).
Another option is to find a dingbats type of font with a suitable glyph. Then you can use "plot with labels" using that glyph as the label string. See for example the 5th plot in the demo
http://gnuplot.sourceforge.net/demo/stringvar.html
I haven't played around with this feature at all myself, however, there is:
http://gnuplot.sourceforge.net/demo/barchart_art.html
Which shows the use of png files on a bar chart (Note, that this feature was added in Gnuplot 4.5 -- I think). With a little creativity, it seems like you could use that feature to do what you're asking -- although it would require a whole bunch of plot commands so it might be useful to write a script to generate the gnuplot script (or use iteration depending on your dataset) -- Obviously your image files would have to be in a format that your version of gnuplot understands as well ...
A possible strategy may be the plot with rgbimage option in gnuplot.
See the second example over here: http://www.gnuplot.info/demo_4.2/image.html
If you relate the center option with your data points, this may be possible.